Probably because the fans are very difficult to control, unlike the customers in the store.
This is a really serious problem and I have a feeling that the fans, except in very limited numbers and not everywhere, will not return to the stadiums for a long time.
I’m actually sorry about that because when I watch a game without a spectator it really looks sad and empty, there’s no real atmosphere.
The financial losses of the clubs are already very high and in the lower leagues the clubs have already been brought to bankruptcy, and this is becoming an increasingly serious problem.
Nevertheless, this UEFA decision gives hope for at least a partial return of fans to the stadiums and the return of a real football atmosphere.