What happens is that some people routinely use your purported reason "it's LLM generated" as an excuse to try to discredit anything at all, and it's not right, irrespective of whether the material is LLM generated or not. Any material should be critiqued on the basis of its own merits and demerits, irrespective of who or what authored it. We need to shed the pro-human bias.
I am pro-truth. Being pro-truth is more pro-human in the long term via indirect effect, than is being pro-human directly. Focusing on being pro-human can reward bad behavior among masses of humans, leading to their ultimate downfall. I will leave it at that.
One line summaries of comprehensible articles can get downvoted because they don't add value beyond what's already very clear from the article.