3 Man PCA Question

[Freddy]

New 3-(hu)man newbies usually have one question regarding the PCA between C and T: "Why is it that T's area above the FT line goes across to C's lane line extended. Why not make it easy and just have C take everything on his half of the court? Why is it that T's area above the FT line goes across to C's lane line extended?" (OK, that's three questions, but you get the idea). I know what they mean, because they're thinking it's easier to remember, at first, that C or T has his side of the court when the ball is out top.

"Someone who knows a whole lot more than I do came up with it--just learn it," is one of my first responses, followed by one or two others.

What would your seasoned response be?