That aversion to "techbros" comes from people who constantly oversell whatever the current thing is for personal benefit, and these technologies come up short time and time again. The "techbros" as a consort have proven themselves not to be trusted. Say what you want about AI, it's hard to argue that it isn't oversold constantly. I sincerely doubt it would continue to exist without a stream of VC money to sustain it (All of those paying customers still don't cover the bills...)
Everything is oversold, even the useful things. Nuclear, space, genetic engineering, x rays, vaccines, the internet itself, personal computers, phones and apps, etc. etc.
If something is of value X, the hype will be X+Y. That's why this is too shallow an analyis. It's just vibes, based on cultural feelings and emotional annoyance.
AI is nothing like blockchain.
It's fine to be anti-AI, but the smart anti-AI people recognize that the real danger is it will have too large an impact (but in the negative). Not that it will evaporate some investment dollars.