Earlier quoted context omitted.
People often resort to containerization when they've lost control of their dependencies. Containerization is only completely effective when you control your dependencies and if you control your dependencies... You don't need the container.
I use docker because it's very easy to deploy home-server style. I don't care about dependencies.
Later on I worked at a place that had gigabit Ethernet and got into an argument with the CTO who couldn't believe the build process (which built software packed it into containers and ran a system based on containers) took 20 minutes. I set my stopwatch and it was 18 minutes and 27 seconds and a lot of that time was Docker doing ultimately meaningless I/O.
People think Docker is doing something positive for them when it is really killing their productivity, making their projects late, giving them time to go get coffee, etc.