Making it so they aren't in the pool of errors that can be made. I want to be able to type swear words, but I don't want profanity to come out when I try to swipe "duck". Socially, emotionally, and politically loaded phrases make sense to require a bit more care for.

That is a general answer to your question. It is not a specific defense of the particular word list in question. But I can say I've been surprised a few times about what I accidentally swiped on Android. Bitch isn't swipable but I have "bitchiest" readily available, for instance.