Um, did you even read my message? The one that looks at the results that real basketball players put up, and shows that despite what we all assume, there isn't a relationship between the ability to hit field goals (or 3 pointers, though there's a bit better relationship) and the ability to hit free throws.
Now your point about the 22% FT shooters isn't a bad one, but it's easily overcome by the GM making a good choice. Train FT for a few weeks, and you won't see those type of mismatches. Or maybe people would prefer having an atrocious FT skill hold back their JS and JR training. Cause like Charles pointed out, not many people are arguing it that way.