I'm not saying he should. Just trying to understand the issue.

Apparently there are two conflicting contracts (or two sections within one contract), and Branch is counting on the fact that Branch can go after Kevin but Kevin can't/won't. Or maybe the contract is clear, but Kevin just doesn't want to burn the ships.

They aren’t conflicting.

Branch is obliged to open source the Launcher.

That’s it.

An employee of a company just isn’t allowed to do it on his own.

If a company refuses to pay a bill that it should pay, then one of its accountants cannot simply transfer money.