Normal people take ultrawide photos all the time. You make it sound like 0.5x is some special tool.
Human peripheral vision is close to the field of view of 0.5x. This is why so many people use the UW lens.
If you had a UW lens, we'd be able to see half the room, not just a corner of it.
Actually, no. Human's real field of view is equivalent to about 43mm on a 35mm-equivalent image plane.
Meaning... the 2x lens is actually closer to what humans see in perspective. The difference is that since most of us have 2 eyes and not just the one, the actual result of the total field of view is a combination of both eyes, thus leading to a focal length of... surprise: around 21mm.
Which... incidentally, is actually NOT ultra wide. Note: Ultra wide or 0.5x on iPhones is about 13mm, which... no matter what metric you want to use is NOT what humans see.
Please research the topic a bit more deeply before making these statements.
Please also note: I'm not dismissing the fact that perhaps more people are using their UW lenses. But I'd highly suggest that you research human eye perspective first before saying the 0.5x view is closer to what people see. It's really not.