Given that the studios have now openly admitted their plan is just to wait the writers out, actors need to step up and throw their weight in on the writers' side. Because its not that easy to replace quality writing with AI just yet. But we've had the tech to replace quality acting with CG and text-to-voice for years already. So actors aren't even doing this for the writers, they're doing it for themselves because they're next. They cost way more to employ but are easier to replace with existing tech.
Edit: I realize this strike isn't about the writers but rather the actors own collective bargaining, but my point that they're all in on this together and being threatened by the same emerging technologies stands.