Quoted from DeadFlip:
"one could also argue an escalara is as much as a pinball, or 50 times the cost of a hand cart from harbor freight, but people still buy them"
Thing is, the Escalera is a lifetime tool that can be easily used for all your pins at a moment's notice, whatever the occasion. And used for other things as well. And probably loaned or rented to recoup that upfront cost over time.
A set of self-leveling legs, that has to stay with the game? Hmm. If you have a game you bring to lots of shows and stuff I could see it being very handy. But for average home or location use, where you "set it (up once) and forget it"... not so much.
Conceptually you're on to something, though! But apply it to the playfield itself, and you not only solve an issue, you can make it mode-interactive. THAT could add value... "I mock your pithy shaker!"