But it's a myth that all races are identical except for aesthetically. We evolved on different continents to deal with different conditions. Africans have better lower body strength and Europeans have better upper body strength, if I remember rightly. It's not racist, and yeah of course people can be born outside the mold and better than the race that's supposedly better than them at something, but in general terms that's just how it is.
I don't see why that matters. Why it's considered offensive to talk about it. It isn't derogatory to anyone involved and it isn't limiting anyones potential to just acknowledge it.
I don't see why the FA should care if more asian youths take up football. There's nothing stopping them if they want to, and we can't make them play it in the name of diversity if they don't.
But it's also a myth that these differences are at all very significant. There is so much diversity within people's own races that it's a bit silly focusing on the differences between two groups that are, on average, very very similar. For example, the average white man and average black man, genetically speaking, might have some non-superficial difference in physique or intellect. But why bother emphasizing that when you and your next-door-neighbor of the same race probably has just as many differences, if not more? There are thick and smart lads in every classroom around the world, and those who are better at sports and those who aren't, etc.
I'm no expert on this stuff, but I've read enough to know that the people who are experts generally agree that there aren't significant differences. That isn't some grand PC conspiracy, that's just what the science and most scientists say.
And you're right, discussing these things on their own isn't racist. But given the controversial history and the fact that there still are a lot of people today who bring it up to only put others down, you can understand why people can get sensitive.