In summary, Tifa was not requested to get a smaller chest, only to be given a proper garment. With that said, of course it makes sense for Tifa to wear a high-impact sports bra. Tifa fights, runs, jumps, and does all sorts of physical activities in FF7, and let me tell you: not having the proper bra during intense activities can be annoying, painful, and, I’m not going to lie, embarrassing, especially if you’re as #blessed as Tifa. Yes, she very obviously still appears to have large breasts even while wearing a constricting undergarment, and that is a miracle, especially as someone with such a low body-fat percentage. Of course, Tifa is a fictional character and the laws of physics and realistic body proportions
vary greatly from game to game, but the addition of the sports bra makes sense from a realistic standpoint.