It probably would. Older gamers like myself grew up when first-person games tended to default to inverted look. In fact, it used to be so common, that some of the earliest, like Quake, actually referred to the old "pull back to look up" method as "normal" and the "push up to look up" standard as "inverted".
I'm not sure when or why that changed, but I do remember when games started to default to the modern standard being thrown off when I pulled the right stick or mouse back and end up looking down instead of up as I was used to. (Now that I think of it, I remember a mini-game in Rayman 3 where I encountered it first.)
Anyway, considering how many commercial games still offer inverted look, I'd consider it some kind of legacy accessibility feature I wish smaller devs would include more often, even if a majority of gamers these days don't use it.