One reason that it may not produce good output for you is that you may just be a really smart person. The answers it gives you just seem too stupid to you because you're just so incredibly intelligent that any response it gives seems useless.
Other people like me who aren't as smart as you feel the output is at times relevant and at other times irrelevant. It's not a total waste of time to most of the population as we aren't as smart as you.
In fact smart people like you including the preeminent AI guy Geoffrey Hinton who repopularized AI in the last decade thinks LLMs are trivial in the same way you think of it. Or maybe I'm wrong here. Maybe it's not so clear cut as "total waste of time."
We have given you books, we have given you masterpieces...
You said LLMs produce absolute rubbish always for you. How does humans creating books or masterpieces have any effect on LLM output?
Apologies for not being smart enough to understand you.
Smarten up and you'll appreciate the real things.
I got impressed when GPT-4 was able to explain "TVC" from Permutation City.
Popular != Good
That's highly irrational and illogical. You are not thinking properly.
Popular can equal good or bad.
Other people get value out of these tools.
But any mention of AI raises a crap ton of VC money so gotta keep that sweet sweet founder bandwagon rolling.