Powered speakers show audiophiles are confused

What you said is not wrong, but it is also not the whole story. 

"this concept is much more important to sound quality than the vibration systems we often buy."

This is true when the transparency of a system is very low, like powered Gelenecs with something like Mogami cables. But once you move to very high levels of transparent high-grade audio components, you will begin hearing substantial effects of having the components inside the speaker versus outside or even the sound of a connector. It's not a black and white argument, it's relative to many situational circumstances. Similar to saying "I have a Prius, and all these Forumla 1 engineers who talk about the importance of aeroyamics is simply irrelevant. The difference in horsepower is far more important than the shape of a car." On a Prius, that is absolutely correct. 

Therefore, please avoid black and white thinking in audio.

17 of 23 speakers in my studio and home theater systems

Why do you have so many? Why are the remaining 6 not powered? Are you into professional recording? I don't find enough time to listen to my 2 speakers. I am jealous that you have so much time. Enjoy!

vibration systems

Wow, that's a new one on me. It sounds like a term coined from the 1930's. 

If an engineer can build an amplifier specifically designed for the components of a particular speaker and the way they react to each other electronically the engineer can design the amplifier so that it matches the needs of its drivers and crossover networks, without an amp / speaker unit the engineer is only guessing. Using some random amplifier will never give you the exact needs of your specific speaker unless the speaker and amp are made as a unit. 

I have a Dolby Atmos system and a home theater system in the same room, they are set up separately from each other, of course the home theater and stereo sounds much better but the Genelec mixing system sounds more accurate. 

You don't have to be much of an audiophile or even a professional audio engineer to be offered vibration dampening systems of all types, to mount under speakers on stands, as equipment racks, under equipment feet, in the internal frame of components, under speaker cable and AC cables, vibration is big business. When the speaker is in the same enclosure as the amp how in the world can you take out vibration if it mattered all powered speakers would sound awful. 

With only a few exceptions high end audiophile systems don't design amps and preamps for particular speakers, why because audiophiles like to tinker and argue about how the sound changes when the speaker cables are to close to the floor. Someday the powered speaker will be be the audiophile speakers of the future as they are now in concert systems with networked audio (connectors don't matter). Or perhaps audiophiles don't care about sound and only care about audiophile community, maybe that's ok, I'm one also.

Home theater is not hifi. Whatever. You are smoking it's not the same thing as what the audiophile community smokes. Peace ✌️