It always bothers me when people suggest that AI could be the "great filter" in the sense of Fermi's paradox. Yes, AI may well wipe out biological life, but all evidence suggests AI will have a much easier time with space travel compared to biological life, and it will emit much louder signals unless it is intentionally staying silent.
Awareness of the dark forest theory would cause AI to stay as silent as possible.
Dark forest theory is fun to think about but there's very little reason to think it's actually true.