A big chunk of the club's appeal is signing superstar players. That is not going to happen again for a long time. Not even a club like Madrid managed to sign an obvious Madrid fan from a joke club like PSG. Money talks with superstars.
You can maybe develop some talented kids, but that is a looong process and most don't have the patience for it. They want titles now. For that you need big bucks.
Barca is owned by Catalan socios, you are talking from international fans POC.