I do research with LLMs all the time and I trust them, to a degree. Just like I trust any source and any human, to a degree. Just like I trust the output of any computer, to a degree. I don't need to verify everything they say, at all, in any way.
Genuine question, how do you think an LLM can generate "bullshit", exactly? How can it be that the system, when it doesn't know something, can output something that seems plausible? Can you explain to me how any system could do such a thing without a conception of reality and truth? Why wouldn't it just make something up that's completely removed from reality, and very obviously so, if it didn't have that?