the reasons why pro-audio equipment are not typically seen in the home environment are severalfold. some of these reasons have already been mentioned, so consider my restating them as just lending a +1 to each of the points.
1. aesthetics - pro-audio equipment doesn't have to blend into a living room. as a result, most are just black boxes, many without grill cloth. real wood veneer and gloss finishes are time intensive, so comprise a good chunk of the cost for speakers with these finishes.
2. marketing - consumer audio products have more marketing dollars in the cost of the product than component costs. since pro-audio equipment is designed to be used as a "tool" vs. a "toy", the pro-audio guys focus largely on the performance, while the home audio guys focus on whatever they fixate on in their favorite audiophile magazine.
we also purchase brands with which we are familiar. many of the consumer brands don't have a pro-line and the pro guys don't waste their time and money trying to convince consumers to buy them.
3. connectivity - many pro-audio speakers use balanced xlr connections, though many pro audio speakers now includ both options.
4. amplified - many pro-audio speakers have the amps and eq built in. this limits the ability for the consumer to "upgrade" components over time. with pro-audio, you get a decent set of monitors and decent xlr cables, plug them in and you are done for 20 years. that is not very much fun for the tinkerers. this is why powered speakers (pro or not) have never caught on in the home audio market.
5. tuning - many pro audio speakers have high -3db points, this way they blend nicely into a system with a second order high pass at 80hz, creating a 4th order acoustic slope. the result is a speaker that integrates nicely with a subwoofer. the downside is that if the monitors are used without subwoofers (which many home audio guys prefer, the bass will sound thin). this is the only "performance" difference that i can identify.
6. availability - pro audio equipment is sold in different stores from consumer equipment, so most consumers don't even know that the world of pro audio exists or they believe mistakingly that pro audio is only for clubs and bands.
7. audiophiles who don't eq - many audiophiles attempt to correct for room problems or listening preferences by purchasing speakers with non-flat frequency response, non-smooth power response, or other distortions. you will notice that a large hump in the bass is not a popular "design" feature of many consumer speakers. it is because most people prefer a little extra energy in the bass, particularly for home theater. if you are religious against using eq, the only way to get that bass is to move the speakers around the room or buy speakers with a non-flat frequency response.
as for other performance arguments, i can't find any, except maybe the pro-audio equipment is much clearer about describing the performance of their systems--distortion vs. spl charts, maximum spl, directivity, etc. as for things such as baffle step and directivity differences of a studio or a home, good pro audio monitors will typically have eq switches to account for placement. the pro audio companies know that some studios will soffit mount while others may use stands while others may place the speakers on a shelf just above the mixing board.
it is important to recognize that while most people "say" performance is the most important aspect of their buying decision, that is actually not the case. if it were, many more people would be using pro audio equipment. we have all seen the kids at best buy standing around the pair of subwoofers, with glowing lights, plastic pieces glued on the drivers, and we have shaken our heads...then we have all seen the adults in high end audio stores sitting in front of amplifiers the size of television sets, with cables the size of garden hose, all while plugged into a little set of 6.5" two way mini-monitors, and we have shaken our heads...but this is america where we all get to spend 50% of our money however we wish (the government spends our other half for us).
so this is a very long winded way of saying to the op that it is okay to use pro audio equipment in the home environment. not only that, but the pro audio equipment will outgun most consumer grade equipment across every performance dimension.