That's fine. They can live their lives the way they want over there, and invest in their local sporting teams accordingly. But they can't complain about English clubs spoiling their Super League plans by not joining if they don't want to, mostly in part due to the fact that their product is plenty profitable enough.
By all means, Barca, Real Madrid and PSG can put all their remaining money on black and spin the wheel if they want to, and invite along your Marseille and PSV types as well. But they know it will last just as long as Messi does, because superstars are in short supply once he retires, and that is all that will get people watching. Proper competition is what makes the PL the most-watched league.