It's a somewhat annoying to me as well, but I'm now able to read it and take the valuable content without getting hung up on those repetitive phrases. It also forces me to not simply copy/paste. I read the LLM output, think about it, comprehend it in my own voice internally, and then I write what I want/need by hand, so it ultimately comes out in my own style and I don't propagate the LLM output onto others needlessly.
Glad I saw a comment like this.
TBH, while I may find the output style somewhat infomercial-ly, I don't really get the hatred. ChatGPT IS NOT AN ACTUAL PERSON. Like why do people care so much? Like you said, I just ignore the "persona" phrases, and just use ChatGPT (or, used to anyway, before switching to Claude because OpenAI leadership can suck it) to get information and answer my questions.
Seriously, though, just stop using ChatGPT in any case, there are very good reasons to boycott it and there are other alternatives. Not saying the alternatives are saintly, but they're not as awfully duplicitous as OpenAI.