Because as Terry Pratchett astutely notes in the Hogfather belief is what makes the human society possible. We invented justice, mercy, duty, laws, money etc. They exist only because we believe in them. Some beliefs make the world better, other ones worse, and we should try to emphasize the former and minimize the latter.

It’s not just using an LLM to assist. It’s more generating the whole source with an LLM, running it once to check if it seems to work (if it “vibes” good) and then publishing it without even trying to read through and understand the code.

Edit: just to clarify, the odds are that the generated code performs awfully, doesn’t handle even the simplest edge cases and has security problems.

You ask an LLM to code something and then just run the code blind without reading it and if it seems to work, publish the application. You can imagine how many performance and security problems it produces.