The education and conference industry are driven by those deltas because that's where the lucrative jobs are
These things tend to fall in on themselves. Ten years ago for instance, large scale data stores were the rage. Everyone was rolling out petabyte solutions for megabyte problems. This went on for years before people realized it was absurd.
You're finally starting to see this in containers. It's container overload for really simple problems - like hiring earthmovers and cement mixers when your construction job is installing a bookshelf.
People want to expand their resume and use their current job as a stepping stone but they're also creating messes by using inappropriate tools.
It's an industry problem.
Each one is it's own container, with all the baggage that comes along with configuring your helm charts, managing egress, dealing with people who want to manage security with IP address references, etc. Considering how simple a lot of these things are they should be a serverless function until the point is reached where there is a strategic advantage to the overhead of managing K8s.
I would say that >50% will never reach that stage and all that it is adding is overhead of configuration, and overhead of managing the container security.
I'm sure there are others in the same league that I don't know about. Maybe I'm just getting old but I'll never understand the rush to use k8s in teams of <100 developers.