Web3 conference is gonna be a cult. It is not like, say, a JS conference and someone is talking about the drawbacks of JS and while people may frown they will probably accept it. This is more like talking about celestial orbits at a flat earth meetup.
You're unlikely to get healthy debate about JS at a conference where's predominantly investors that care more about ROI than the tech itself.
Same thing with the web3 conference described in the OP where it seems it was predominantly for cryptocurrency investors, not hackers.
Most of the hacker-focused web3 conferences I've been to have had a healthy amount of debating and criticism over things that are not working in the space. I can't deny them looking very much like a cult though…