You know, one thing I’ve been thinking of on the topic of believability is this observation I learnt from Visakan (on Twitter): real experts can articulate the tradeoffs that you might need to make. Whereas non-believable people will just spout advice from a place of “blah blah this thing is good”. (And they may be very articulate about it, which makes them dangerous.)
So one way to push back if you’re talking to a lower/unknown believability person is to ask them to articulate the tradeoffs you’ll encounter when you have to put their advice into practice. And to ask them for real world examples, preferably from their experience.
Unfortunately, you can’t do this when you’re reading advice on the internet (say if the authors are pseudonymous, as in https://staysaasy.com/). So there’s a limit to the usefulness of this approach.