IIUC installing the snap should be easily reversible, but it only installs an installer :). The installer then does some much more intrusive stuff, It has to install kernel modules for ashmem and binder.

Can't really blame the devs, it's easy to see how this would be a hard thing to package via normal techniques.

I thought snaps were meant to be a container-like thing. Try it on a VM if you're worried?

Anbox in docker should be a good choise here.

It's already using containers (LXC) for running the actual Android system. The rest of the package contains kernel modules and udev rules, which aren't suitable for containerization.