Well, in reality, sometimes yes, sometimes no. If the teacher says: “Look, I’m throwing out ideas here, I’ve no certainties in this area, feel free to jump in and contradict me or enlighten me at any stage, I’ll spitball first, then you go, let’s get crazy here”, then that wouldn’t be a “problem” whatsoever.
[full disclosure: speaking as a teacher who does this regularly]
It’s only possible to view it always and everywhere as a problem within the framework of “teaching” as it is currently commonly practiced, where the “expert” dictates the laws of reality to the silent, motionless, bored pupils.
This framework is completely silly though, for many reasons, including but not limited to the fact that it produces a certain number of people who think that talking about “facts”, or “ideas”, or “concepts”, means entering into a petty tit-for-tat little game of some kind, and that there’ll be gold stars at the end, and black marks for the bad kids.
Which is exactly what you at least sometimes sound like in your comments. We’re not in school; when someone is polite and positive in a comment, that doesn’t mean necessarily that they’re “sucking up” to “teacher” and you have to rebalance the scale, it often just means they’re being polite.
When someone is impolite and negative in a comment, presuming things in bad faith, etc, it doesn’t necessarily mean that they’re being a cool rebel, either, it often just means they’re being impolite.
Put otherwise: pointing out worries, criticisms, mistakes, errors, bugs, etc, is a great thing to do, but it can all be done in a way that is totally different to this weird “I’m right, you’re wrong” framing. There’s just no need for it. I’m not sure if you specifically as a person can learn it at this stage, I’m just saying, it can be done.
Anyway, I agree with @Shu that we’re derailing a wonderful update, regret not having the strength to resist responding, would happily accept mods moving these posts to their own thread, and hereby reiterate my belief that the mods don’t get half the thanks they deserve.