I'm sure you could make a native containers ecosystem for MacOS, but Docker containers contain software which is written for and compiled on Linux, and they need a Linux kernel to run. Docker containers do not provide a kernel - it uses the host. It is literally no different than taking any binary compiled on Linux or Windows and asking why it won't run on MacOS.

So even if Docker supported a native container system on MacOS, it would be useless because no Linux Docker images could run on it.