[dagw]

not every great basketball player is 7' tall

In fact look at any list of the greatest basketball players of all time. Very few of them are 7' tall. Now look at a list of pro basketball players over 7', most of them are middle of the road journeyman players most people haven't heard of.

[ZeroFries]

I feel like this is a trick of statistics. Very few people, in general, are 7' or taller, and very few people are the best at basketball.

See (1), and replace "have disease" with "7' or taller", and "test comes back positive" with "good at basketball".

1: https://www.math.hmc.edu/funfacts/ffiles/30002.6.shtml

[ktRolster]

Add to your point: the vast majority of 7' tall people are not very good at basketball.