The fact that's it's allowable means it's fine and appropriate, you are speaking in emotional contradictions.
Allowable does mean the same as appropriate.

And fine typically means normal and acceptable. Allowable is not the same thing as normal, acceptable.
The Church allows people to only go to confession once a year, before stepping in and forcing them.
Going to confession only once a year is NOT fine, nor is it appropriate for those trying to save their souls.