They aren't all over the place, in fact they are far more advanced than whatever you're referring to. Containers on Linux have also existed for a long time:

https://blog.aquasec.com/a-brief-history-of-containers-from-...

The containerization solutions you're referring to didn't gain widespread adoption like Docker and Kubernetes because they weren't as polished and lacked features and functionality that is available today. Windows containers have a big image requirement, and most server-side software is already optimized for Linux so they aren't in high demand. Just take a look at Docker Hub and tell me how many Windows containers you find compared to Linux, especially the official images of the most common software.