Because it's a bad choice. You are not given many ways of customizing your character after creation beyond choices you make within your class. And two major ways of customizing your character (ASIs and Feats) are put in direct competition with one another, so instead of getting more options to fill out your character you instead can only use half of them. Combined that with their relative scarcity and it's just a very bad option.
I think going forward, I am going to offer two +1's at every feat level, and removing the asi buffs from feats.
This slows down progression, but doesn't feel punishing, and it allows the freedom to explore other options. That second +1 can go in a lot of places, after all.