I mean the similarity is not a coincidence. Gaming chairs are modeled after racing seats which are five point harnesses designed to keep the occupant safe in a car crash... exactly like toddler car seats.

I can see a use for actual racing seats in racing games to enhance the immersion. The faux racing gaming chairs took off because some chair company sponsored streamers. Streamers like them because they're something to look at on stream rather than a bland office chair. For everyone else a bland office chair is way better.