Again back to square one, the indication to final table.
You will show me United, City & Chelsea as only winners of PL.
Similar to Barca & Real only winners of La Liga.
But Liverpool have contested for the title, Arsenal have done so, Tottenham has, in addition to usual Chelsea, United, City.
Now look at LaLiga, When Barca wins, it's only Real as competitor, When Real wins, only competitior is Barca.
Which is the discussion. La Liga provides very little competition to title winner.
Even when PL was two club league in Arsenal & United, teams like Newcastle, Leeds, Liverpool have contested for title.
But La Liga has only A. Madrid to offer.