That's all fair criticism.
My intention is to make it so enemies have multiple versions of their fights that either focus on Muscle or Fat like how the Treasure Dragon works. Then the Manliness/Corpulence curses can be a way to select whether you'd want to see more Muscle or Fat content.
For the Debt/Competition curses: I eventually want to implement things that can make it harder to get huge too quickly so that should help those curses. Though maybe being able to get those curses part-way through a playthrough could be a thing at some point. I'd have to think about that.
And for the Curse of the Giant Boyfriend, what I intend for that should make it very different. For example, the player character's growth would be severely nerfed so that you won't be able to get huge (unless I later implement a route to also make you big, but the main point of the curse will be making the boyfriend huge)