Well, no one can accuse you of lacking passion, that’s for sure.
You may not like it, or want to believe it, but language DOES serve as a barrier.
I’m sure you’ll simply dismiss what follows as anecdotal, and therefore unimportant, and you may well be right, but I see this kind of thing all the time, not just in sports.
Whether in schools, or churches, or businesses, or any other endeavor of life, people feel like they don’t belong and are not wanted when there is a set of jargony-sounding words and phrases they need to learn and use if they want to fit in. Sports is no different.
Sometimes this is not a problem, because people really WANT to be a part of the group. I’m sure there are Americans who are eager to be seen as true fans and call it football and refer to kits and the pitch. I don’t know any personally, but I’m sure they exist.
But for a lot of people expressions like these really are off-putting. I played a lot of soccer growing up, not at high levels by any means, but I played; both my kids played; many kids I know play. Some are pretty damn good (not my own kids). I listen to them talk; they put on their “uniforms” and go out onto the “field.” They don’t use the England-ish terms any more than they talk about getting their trainers from the boot of the car after practice.
These are the American terms; they are perfectly good terms. If people are made fun of, or thought to be somehow wanting, because of the language they use, they aren’t generally going to flock to something new.