But that is just you way of defining it, which is not inherently wrong but still subjective. Why are the people who claim you need a global competition to be called world champion wrong then?

Even in track and field most of the top countries can have more than one participant as long as they qualify. Going by the logic of Lyle’s defenders, each country should only send their number 1 sprinter to the Olympics even if that country’s number 2 sprinter is a lot faster than the sprinters from other countries. What if all the athletes who qualified were from one country would it still be considered a world championship?

track and field (world champion or olympics) is not inherently exclusionary though, which the NBA is. Like if one country just happens to have all 8 best sprinters in the world that’s fine as long as the competition is open for sprinters not of that country.

If FIBA doesn’t have any competitive Club World Championship every year then it’s safe to assume that the best Professional Basketball Team in the best professional basketball league in the world are World Champions or World Champion Professional Club/Team.

Key word is assume here. We can assume that would a club world championship would be won by the NBA champ, so we can assume the boston celtics would be called that. But it stays just that, assumption. a thing that is accepted as true or as certain to happen, without proof. Europeans/rest of the world are annoyed by the nomer world champion, because in their heads in requires the proof of winning a ‘world championship’ because that is how the world champion gets chosen in most other sports they watch.

Ultimately it’s a discussion of semantics, because i can see that on an emotional level for a lot of people there is no difference between being called ‘world champion’ or ‘best team in the world’, the latter on which no-one would really argue the NBA champ isn’t.

Would there be a club world cup for basketball (which in my opinion there should be), most europeans and others would not argue against Celtics being the best team if they won that, even if it would be a foregone conclusion that they would win it.

Have you by any chance heard of the fighting video game tournament EVO?