So is every club bar 4 or 5 (your Man City, Manure, Barcelona, etc).
The problem is that any money coming in won’t be reinvested. So if they do happen to stumble across a player like Longstaff, despite the utter embarrassment we have of a youth system, there’s not even a conveyor belt to ensure that another youngster will come through. We’ve had two decent players come through in 10 years ffs. And even then one of them has only had a handful of PL games.