Isoacoustics Gaia Speaker Footers

Why would anyone put a footer under a speaker that allows the speaker to move at all?  That defeats teh purpose of seeing a speaker in place as the drivers are moving around.  That's just me, but I've never in my life heard a speaker sound better using any footers that allow movement, but that's me.  I do like the Isoacoustic feet under some electronic gear that is in metal folded boxes and not the milled ones.  

For my dollar, HRS is the best as I've never heard them degrade the sound of anything (although I have no idea about their racks as there is just no possible way you can just move racks with your gear to A/B things, lol.  

@jbevier, my stereo towers weigh "only" 106 lb., but foot threads are M12. I see that Gaia I includes M12, Gaia II does not, yet Gaia II would support my weight.

You also say Gaia II can be offered with other thread sizes. What is the best way of ordering Gaia II (lower price) with M12 threads?

@hickamore 

If you order GAIA from a dealer, just let them know you need the M12 thread adapter. They can get it for you from Isoacoustic. It shouldn't cost any extra.

I bought my GAIA footers from

Excellent customer service 

Thanks to @csmgolf, @lancelock. One more question: vibration in suspended hardwood floor is considerable. Can be felt through soft slippers with socks, 34' downstream from source. (I play loud & speakers have a peak at 35Hz). Since the Gaias are said to fully decouple from floor, presumably the vibration vanishes? Speakers are sealed, not ported, if that matters.