I select audio gear the same way i select most other things in life,
Just get the test results and go from there. If I need a vehicle, I determine my needs and narrow down the 200+ models down to a few and then physically look/drive the things. Imagine a car rag that never did acceleration, braking, skid pad, drag strip and mileage testing. I'm Bob, dis car eez fast, handles well, world class brakes and gets amazing mileage....with ZERO test results to back that up. Yeah, not going to happen but audio seems to be the standard.
How loud is a speaker? Well, some manufacturers give that information as Maximum SPL, or--you can determine that with math. Use the sensitivity or efficiency numbers (recalculate sensitivity to efficiency if lower than 8 ohms) use the RMS power ratings and throw in a dB or two for power compression. Then a rough calculation is thrown in depending on listening distance and you have SPL at your listening position. Only in audio is a "professional reviewer" completely clueless to how things are calculated and that is left on the consumer. Kinda weird how that works.
The other charts graphs like on/off axis frequency response, impedance charts, polar charts and so on help define what the speaker generally sounds like. If I see a big hump of +3dB at 100Hz but a trough rolling down -3dB by 1KHz followed by a spike of+3dB at 10KHz and cutting off at -3dB at 20KHz--that is +/- 3dB but it will sound significantly different if the numbers are reversed. This is why a frequency response chart should be provided to inform you of performance. A minimum of 15/30 degree off axis frequency response tells you if the speaker has a wide sound field that holds together or falls apart rapidly. The FR going to hell at 30 degrees off axis does not bode well when used in a lively room--the off axis poor response will reflect and make a mess of the on axis response.
The waterfall charts and polar charts inform you about resonance in the drivers and give a visual indication of the dispersion across the frequency bands. This is not hard to figure out, does not take that long to read and understand the ways and whys it is measued that way. Rots O Ruck finding those measurements--heck, most review rags won't even squeak out a on axis frequency response chart. If they are too lazy or to incompetent to actually test a speaker--then I don't care whatsover what their opinion is. If I wanted an opinion, I'll ask the red headed lady next door--at least she would be honest about it and is not trying to create click bait, maximize views or get kick backs from links. She has to put up with my crazy butt so tends to be very honest.
I'm also fluent at Google--I can search for the measurements I need then quickly dismiss most audio equipment just by measurements. Get down to the last few then I get more in depth. The reviews generally don't come into play until the last 2 and I generally read the negative reviews which tell me either there is a QC problem or the guy is an idiot. As far as purchasing audio gear because the reviwers "like" it? What do they not like? When was the last time you ever read a review without measurements that stated it was a dog turd on a hot sidewalk? Most reviewers go by the Stereo Review standard of liking everything...
Now if a person that owns the speakers gets on a forum to ask about solving some issue with his speakers--and does measurements to show the flaw--that is informative. You can also search forums to find those situations. This gives the warnings about gear that is actually in use real world. Sometimes you'll get some tips to improve your speakers with additional bracing, a change to the crossover filters or whatever. This is common in professional speakers with alternative parts for compression drivers, better replacement drivers or upgrades to suit different needs. The pro guys are bigger into this because that is their job--not a weird little hobby like consumer audio. You can also use professional gear mixed with consumer audio, quite common to use pro amps for subwoofers etc. I don't think the crews that purchase a million bucks in professional gear depend on a reviewer or entertaining video to make a decision--must have real data because big bucks are on the line.
When it comes to electronics, cool operating temps and long term reliability is what matters to me. Other people it might be aethetics or the highest power available and so on. The electronics part is easy, speakers are much harder since they are the highest distortion piece in the puzzle. Throw in your room has it's vote followed by your age--time is not kind to your ears. Might be wise to bring a young person with you if listening to speakers, they might hear issues in the highest octave you can't detect. Although it won't bother you, it might bother friends you invite over.
In summation, give me the test results first--I know what they mean so go by them. The opinion part is the last thing I might read if required.