Yeah like... on Windows that's the exact same steps you would need to take if you insisted on using binstall? You might have slightly different steps for installing rustup for Windows (e.g. you need to install Visual Studio).

The other path I can see (looking at https://docs.jj-vcs.dev/latest/install-and-setup/#windows) is that you could maybe instead use winget directly.

Though honestly IMO this is more of a failure on the jj devs to not provide something that can be installed straight using apt, I guess (looking at https://docs.jj-vcs.dev/latest/install-and-setup/#linux). For Arch for example you just install it from the official repos.