Barca are 13 points ahead of Sevilla in 4th and 20+ points ahead of Villareal in 5th despite being poor all season long and sacking the manager half way through and the players not being arsed.
It's one thing with huge gaps when Barca and Real were the best teams in Europe and getting 100 points but Barca and Real aren't even at the top table now in Europe.
Difference is in past season when Barca and Real were vulnerable other clubs stepped up. Valencia and Depor won titles in the 2000s. Sevilla and Real Sociedad took it to the last game. Atleti in 2014.
In Europe still only Bayern, Madrid, Liverpool and Juventus have a better points % than us. Madrid will likely finish with 89 points, last season we had 87. Those are very typical numbers for any title winning club in a top European league. The past decade of needing to finish in the mid-nineties to win the league were not normal.
If you want to talk about other clubs winning the league in the early 00s, back in those days Madrid and Barca were finishing with even lower point totals than we are now.
In 2004 Valencia won the title with 77 points. We finished with 72 that season and Madrid with 70.
In 2000 Deportivo won with the league with 69 points. We finished with 64 and Madrid with 62. Atletico has 69 points this season and Sevilla has 67, both with one match remaining still.
75-80 points were considered high totals back then.