Writing software that works containerized isn't that bad. A lot of the time, ensuring cross platform support for Linux is enough. And docker is pretty easy to use. Images can be spun up easily, and the orchestration of compose is simple but quite powerful. I'd argue that in some cases, it can speed up development by offering a standardized environment that can be brought up with a few commands.

Kubernetes, on the other hand, seems to bog everything down. It's quite capable and works well once it's going, but getting there is an endeavor, and any problem is buried under mountains of templatized YAML.