I don't understand why this is a problem at all. AFAIK macOS is UNIX, so you can create user accounts and run programs as separate users. This is what I routinely do on Linux to run coding tools or other programs that should not have "full disk access," in particular to the files and mounts of my main user.
drnick1 · · focus · HN ↗
NotPractical · · focus · HN ↗