Its a remnant from a time when club football didn't have billions and billions of pounds in it and it was genuinely the highest level of football. But it's hard to change people's minds when they've grown up hearing that it's the pinnacle of football
It's by far the biggest and greatest football stage in the world today. It's as simply as that. There's no question about it, it's just the fact. There's nothing in club football that even comes remotely close. That's not talking about the past, it's talking about today.
Also, unlike club football teams, it doesn't involve buying titles like Man United, Man City, Liverpool, Barca, Real, Blackburn, Chelsea etc etc do and have done in club football.
On another note there's a difference a with a player playing well surrounded by all the best players bought in the world, dominating a league and a player turning up and showing true quality when your team mates are not the best in the world. So many players shine when surrounded by a team bought to win a title, a team dominating everything through steeling every other clubs best players , yet don't show up when not surrounded by the same for a national side. I'd question their true quality. Sadly some people make excuses for them. There are some United players who today are regarded as the best ever, when taken out their comfort zone at a dominating United who had the best of everyone apart from Real and barca, were pretty rubbish for their national sides.