Why would Google pay employees to not go to Apple?
Guido van Rossum (creator of Python) is a Distinguished Engineer at Microsoft. Before that, he worked at Dropbox.
I get the quarterly check-ins from the "alumni recruiting" team, and can assume Guido does too.
Who can divert from Google's massive ad income funnel?
Apple.
Facebook.
(Also maybe several foreign governments' antitrust cases.)
An engineer on your payroll is an engineer not on the competition's payroll.