The Podman developers did contribute to Docker for a while before starting the project. Docker kept introducing issues and had some fundamentally bad design decisions that they didn’t want to change.
At least try to look into the history of these things before making broad and easily falsifiable statements.
Podman wasn’t built due to NIH. Docker has real problems (though many have been fixed), and Podman was built to fix those.
Docker Engine is open source. They could’ve easily contributed patches to it which just further proves that it is a NIH syndrome response.
The Podman developers did contribute to Docker for a while before starting the project. Docker kept introducing issues and had some fundamentally bad design decisions that they didn’t want to change.
At least try to look into the history of these things before making broad and easily falsifiable statements.