Luckily there is a large supply of those people for now. They won't change their interview process until this stops being the case.
Edit: I guess someone at Google didn't like this comment :)
how is that a sunk cost? all the tech companies use the same leetcode questions. If anything it makes it easier to switch job out of google because oftheir prep.
(Not commenting on the underlying discussion, just the particular logical point.)
Of course you'd want to hire people who want work for your company. That's call a matching-process.
Would you marry someone who's not into you?
Trophy spouses are a thing. It ends about the same way. An opportunist doesn't change their ways because they achieve one goal.
Incidentally, companies are perfectly capable of exploiting a superstar developer who thinks he is above the company by the usual group pressure tactics.
Especially if that developer is self motivated.