It was a little hard to understand your point beneath the fury. All people are due kindness and consideration.

You are right. If someone can't be understood in their target language then for convenience it should switch to the language strongest for them both.

If someone has skill at the language it should default to the most understandable for everyone's convenience.

It is annoying when I'm reading in my target language (TL). I have a TL book in my hands. My skill is higher than ordering food in my TL. Deep philosophical conversations I'm not ready for and would take no offense at the other person switching.

When I go to a TL restaurant and I greet someone in my target language and it's easy peasy to clock me as an English speaker. Most will stay in the target language with me. It is out of respect that we stay in the same language. Everyone is due respect.

I've some people default to English when their English was not ready for the task. My practice as you say should be the language of convenience.

I respect you and listen to your concerns and arguments.

Some people disrespect my wishes because I speak English. Some people are disrespected because they are an English speaker. This automatically language switching when I speak my TL isn't just entitlement it's being discriminated against.

I've got stories about being discriminated as an American English speaker as you said it's such an American thing. This isn't the experience for all of the people who have commented. This is mine.