Sharing Docker daemon between WSL instances

Question

Regarding running Docker from within WSL without Docker Desktop, there is a comprehensive article here. However,

When it comes to sharing the Docker daemon between WSL instances, the article only touches the starting bits. This is to ask for the whole process.

First of all, why configuring it to use a socket stored in the shared /mnt/wsl directory, instead of commonly suggested exposing the 2375 port from docker? The reason I'm asking is that I found it challenging to find something to be used as the shared /mnt/wsl directory between different WSL instances, as trying to make use of exiting Windows drive (ntfs share mount) will be peoples' first instinct, however, it won't work. I tried that, trying to call mknod to create a device file in ntfs shared folder, and got:

mknod: /mnt/d/foobar: Operation not supported

Is it because,

The issue is that Docker runs in 2375 but its bound just for localhost in some setups (WSL2 backend / Linux container)

Is it still true? But even that, it's fine with my above case as I'm only sharing the Docker daemon between WSL instances on the same localhost.

So, this is to ask for a total solution for sharing the Docker daemon between WSL instances, that is practical and anyone can follow. thx!