The problem with people is we love to express in writing things we are ignorant about. Now, this helps us become less ignorant if we are introspective, but a lot of people are not doing it for that reason.
The fact that every new model generation has come with more capabilities should give the full skeptics at least a little pause that the foundations of their convictions may be incorrect.
It's not even clear that the actual LLMs have improved. It could be all the non-LLM software (harnesses), the system prompts, the sheer amount of compute hardware, etc. that makes them better. We could be quickly running up against a wall. The complete package of technology that is OpenAI's and Anthropic's products are completely opaque and proprietary. The psychic/con artist communication both from the LLM and the humans like Sam Altman only muddies the water further