Your implication is that the pool of talent is limited and that there is some sort of zero-sum game being played.

The pool of talent is clearly not limited and there are multiple indications of that e.g. a rockstar developer would be employed at rockstar prices of millions (or signed on at millions as per your sports analogy).

If Google were to take a talented person out of the pool, the loss to the competitors is the marginal difference in talent to the next lower talented person.

Put simply, the variation in measurement of talent is large, and training can make huge differences to talent levels. Your premise can’t work without some sort of perfect oracle.

That isn’t to say it doesn’t happen at some microscopic level, or that it doesn’t happen with some particular individuals... Edited: there are just too many sensible reasons why I think it couldn’t happen systematically.