Taking rockstar players 'off the pitch' is the best way second-rate competitors can neutralize their opponents' advantage.
tl;dw: some of it is anti-trust avoidance and some of it is knee-capping competitors.
They want an ROI. Taking them away from competitors is a side bonus.
But sure you cant try and argue that's wage suppression.
In other words, you’re suggesting that _not_ paying high salaries would be good for collective growth and development.
And if Meta is currently willing to pay these salaries, but didn’t for some reason, that would be the definition of wage suppression.
Based on my cursory knowledge of the term, wage suppression here would be if FB manipulated external factors in the AI labor market so that their hire would accept a "lowball" offer.