I think it's funny that you accuse Tesla of making decisions without context for how real people live, yet have decided that this vehicle is useless for everyone just because it doesn't fit your needs.
I'm going to wager that Tesla knows more about their market than you do, and that roof racks are not as important to that market as you think they are.
Well, the truth of the matter is that in terms of annual sales volume Tesla is a small player in the auto industry. If they sell 20,000 of these it will be considered a hit. They'll sell 20,000 units. I don't think they'll sell 200K but 20K, sure.
I'm going to wager that Tesla knows more about their market than you do, and that roof racks are not as important to that market as you think they are.