You gave an answer about your specific circumstances, but tried to project it as applying to the majority. I just don't think it holds up in those circumstances. As for fighting, getting away from them might work better if you don't try to start them in the first place.

Nobody here attributed it to arrogance; and it's not assumption, it's hypothesis based on observation. Your suggestion that people don't want to be doxxed doesn't explain the wide gap between US and non-US streamers mentioning their country. So what alternative hypothesis do you have?

I answered that elsewhere in the thread - it's useful to help attract local viewers, it sets better expectations about active times, and it helps avoid repeated questions about where my accent is from. Just because you don't find it useful doesn't mean it isn't useful.

"Most people don't think about it" is proving the point, though. Most Americans don't think about it, but a higher proportion of non-Americans do think about it. If there's a difference like that along national lines, it's not unreasonable to look at cultural reasons.

I do think it's about assumed defaults. Non-US streamers I know mention it to attract local viewers, and to avoid answering "where are you from" every 10 minutes because someone noticed the accent. On the whole, the rest of the world knows the US accent better than US people know non-US accents.

Khajiit has arts if you have coin!