The other critical factor is the Pep and Klopp pressball revolution which equalled, and by now probably flipped, the once huge technical/tactical advantage La Liga had. For many years PL teams paid players more to play worse football, but that's over now.
The Premier League always had some financial margin, especially 4-20, but since Covid the gap has just exploded, with nobody but RM, Barca and Atleti even on the radar screen anymore, even of PL relegation fodder, and even those three aren't keeping up.
The Premier League is now the indisputable best league in the world under every possible rubric and the margin grows every year.