Because they are swamped and want to automate some of the process.
The way I see it the devs that put that in place are saying, listen before even reading your contribution I am going to feed it to a LLM with these instructions and see what it spits out. Now I will extricate my self from being the LLM proxy so you deal with this output and when it's okay I will look at it.
Same as "listen bud until it passes linting I won't even look at it." Just a much more flexible and fuzzy linter.
The way I see it the devs that put that in place are saying, listen before even reading your contribution I am going to feed it to a LLM with these instructions and see what it spits out. Now I will extricate my self from being the LLM proxy so you deal with this output and when it's okay I will look at it.
Same as "listen bud until it passes linting I won't even look at it." Just a much more flexible and fuzzy linter.