Before I became an employee of mairlist GmbH, I had the same idea in January 2019.
See this thread in german 
: Profile für Stunden-Einschränkungen
Torbens answer:
(“I can only recommend trying virtual folders for this use case.”)
In the meantime, I share his opinion - not, because I’m paid for, no! But now I’m convinced that I was wrong three years ago…