It's easy enough to imagine that Google is trying to fix something they see as a problem, and not caring about the developer case rather than specifically seeking to destroy it.
When Apple fixed security issues that allowed for jailbreaking, they weren't doing it specifically because people use it for jailbreaking, they were doing it because it was a security issue.
We should have 100% control of our own devices. But we should have it by design, in a fashion that makes sure that we control them rather than other people.