Just Post

I think of the first literal floor at the bottom of the building as the first floor, because it's the first floor I see and touch when entering the building. Then when I go up 1 staircase, I encounter the second floor I have seen in that building, so I think of it as the second floor. 1 floor + 1 flight of stairs = 2 total floors, and I'm now standing on the second of those 2.

Saying ground floor feels weird to me because it's not associated with a number, it's a G, when every other floor of the building is associated with a number. I've never used G to represent 1 or 0 in any other context.

It's literally just two correct but different ways of looking at something and we can talk in circles about it all day. If I had grown up outside of the US, I'm sure calling the first floor the ground floor would make more sense to me.