So if you could build a kick drum to acoustically sound like the final processed sound, then would that become a better sound since it could be considered "acoustic"?
I personally have no issue when musicians (including the sound engineer as a musician) choose to intentionally tailor the sound to achieve a desired outcome. There should be no limits placed on the art of music creation...
Anyways, I wanted to add that the mic'ing technique will have a very huge impact on the spectral information in a kick drum recording. Is the mic inside the drum? Is it on a pillow or on a stand? Is the mic in the vent hole? Is it outside the drum? Is it across the room? What kind of mic are you using? Is it omni/cardoid/hyper-cardoid/boundary?
For example, you can go from ~10Hz being the most energetic (by placing the mic capsule right in line with the vent), to the 500Hz-1kHz octave having the most energy (by placing the mic inside the drum up close to the beater). Changing the material of the beater will have an impact too. Somewhere around here I should have a series of measurements I took for myself several years ago.
Btw, you're right LTD02 that a lot of recordings remove the ultra low frequency content....and most of it has to do with the fact that it doesn't sound right when accurately reproduced (that and it definitely doesn't sound good on crappy systems). Most of the visceral impact of a kick drum happens in the 30-50Hz range, and adding extra content below it, for whatever reason, seems to make it lose a lot of that impact.
~It's all about compromise~