Docker != containers. You're arguing as if the srht or generally the diy anti-kubernetes crowd was against containers. Or as if docker was the only mean of secure isolation. More likely than not you'll find them running bwrap, lxc, qemu, etc. You're missing your opponents here, it's very much the opposite of conservative sysadmins that went incompetent and don't understand the new tech. It's (imho) people that are fed up with the "click here to deploy a production server", the "infinite elastic scaling" and the fact that most of these false promises are hidden by bloated software. Nobody is saying that docker gets nothing right, just that most of the time others do more of the good and less of the bad.

> I saw a guy in a video creating an insecure container. Thus Docker creates ignorance

It's more than a guy. Once you see that kubernetes is corporate bloat you gotta ask for the responsability of the people making it. Yes it's creating people that don't understand how things are actually wired (and no, this is not a "natural" direction of history). It's making people dependent on complex stuff and it's actually hiding from mainstream knowledge the simple ways to do simple stuff. I recently had to help someone deploy stuff on an openshift hosting and i must say the experience is infuriating (not even talking about the runtime efficiency of managing the bazillion moving parts).