>In that case Google's policy is what is restricting you, not the license.

In this context, I don't think the distinction matters.

If I was choosing ingredients for a brownie to sell, using THC would restrict which US residents can buy my brownies. Is it the fault of the lawmakers in my customer's state? Or is it my fault for choosing an ingredient that's banned in most US states? If I'm trying to maximize sales, the question of blame is irrelevant.

From a practical standpoint, it doesn't matter whose "fault" it is that a Googler can't contribute to an AGPL project. Choosing an AGPL or similar license prevents me from receiving contributions from people who otherwise might be interested in contributing.