Humans have always appealed to emotion - as part of their logical process.

Fear (emotion) is used (advantageously) to force us to check that something isn't going to break us

In this instance fear is being used to ensure that yt-dlp is not exposed to (genuine) concerns about the quality of bun that is openly being built making use of tools we as a whole know is problematic.

I agree with you that the statements are a bit over the top (that's an emotional response to their statements btw) and that (eventually) you would /hope/ that bun gets to a point where it's got some genuine reliability from a users perspective.

Edit: I see your edit to explain that the issue is ideology - but unfortunately (perhaps) that's not an improved stance - ideology has to guide us when we just don't know - it's a heuristic.