You are completely wrong about the international appeal and international participation in American sports.
Baseball is played in Japan, Korea, Taiwan, Venezuela, Colombia, Dominican Republic, Mexico.
What's wrong with sports being variations of other sports? The basic concepts of balls, bats, bouncing, throwing, catching, kicking, running, bases, wickets, end zones, goalposts, etc are common to nearly every sport worldwide - sniffing at sports because they're like other sports in other countries is ridiculous and mealy mouthed.
You mix up subjective opinions and assertions of fact all the time in your posts.
The quality of US universities very much reflects the quality of education in the US. Even if all you can admit about American universities is that they have figured out how to stay afloat financially, that's more than you can say for most British universities, and reflects a practical and forward thinking sort of intelligence, the sort of intelligence that makes paying academics possible and makes liberal arts education an attractive proposition for prospective students. So attractive, in fact, and so obvious the benefits, that some leading British universities are now offering American-style multi-discipline liberal arts degrees.
What is wrong with attracting leading researchers or teachers from other countries? The entire nation is made up of recent immigrants or descendants of previous generations of immigrants. You yourself are an immigrant.