Why does audacity flatpak need `filesystems=host` permission?

Hello,
I was actually trying to use `persistent=.audacity-data` and bumped on issue #20, but I realized it only worked if `filesystems=!host` is used.

So my question is, any particular reasons for this flatpak have host access?

The issue names no files, tests, or entry points. Start by locating the Flatpak manifest and its filesystem permissions, then determine why host access is declared and whether the requested persistent path works without it; done means the permission rationale or a concrete change is established.

Written by the indexing model from the issue text.