As a technical manager, I'm liable for every line of code we produce - regardless of who in the team actually wrote the code. This is why I review every pull request :)
This is interesting. At what level and team size? There's going to have to be a point where you just give in to the 'vibes' (whether it's from a human, or a machine), otherwise you become the bottleneck, no?
I think there's a place for this, it's not rare for one person to be the PR bottleneck like this, but I don't think it would be for me in either position; people should be able to be responsible for reviewing each others work imo. Incidentally "Agile" with a capital A sucks and should die in a fire, but lowercase a "agile" probably does by necessity mean smaller teams.