The level of the top 4 isn't the way to measure the quality of the entire league.
Besides wasn't it just a season ago that the nr4 in Italy easily disposed of the English champions?
Your conclusion is way too easily drawn.
No, it isn't an indication of the whole league's quality, but at the end of the day you can't say fairer than 3/4 semi finalists, which is more than a distinct possibility AGAIN! Personally I would always back an English team against a team from any other league just because I think the players are a lot fitter being used to a faster game, and more often than not this shows. Technically we aren't always the best (though certainly improving in these aspects) but the sheer pace and power puts certainly serie A to shade. Which is sad to say as the Italian league has always been the one I've followed, and I used to love it when Juve would quite literally teach United footballing lessons each season
That game (Milan 3-0 Utd) was a fluke, in my opinion at least. Plus the 4th team in England easily disposed of the runaway leaders in Italy more recently which kinda makes it more relevant too. From where I sit the pace of the English game is too much for Italian sides to handle. Spanish too but maybe not to the same degree