> We agree to meaning to communicate and progress without endless debate and confusion.

We decidedly do not do that. There's a whole term for new terms that arbitrarily get injected or redefined by new people: "slang". I don't understand a lot of the terms teenagers say now, because there's lots of slang that I don't know because I don't use TikTok and I'm thirty-something without kids so I don't hang out with teenagers.

I'm sure it was the same when I was a teenager, and I suspect this has been going on since antiquity.

New terms are made up all the time, but there's plenty of times existing words get redefined. An easy one, I say "cool" all the time, but generally I'm not talking about temperature when I say it. If I said "cool" to refer to something that I like in 1920's America, they would say that's not the correct use of the word.

SI units are useful, but ultimately colloquialisms exist and will always exist. If I say kilobyte and mean 1024 bytes, and if the person on the other end knows that I mean 1024 bytes, that's fine and I don't think it's "nihilistic".

You could think of the SI as a form of language planning.

https://en.wikipedia.org/wiki/Language_planning

(Then you could decide what you think about language planning.)

I didn't say all language is planned and agreed on. But we absolutely do plan and agree on things.

Technical terms need to be more precise about their definition than regular words.

Incorrect.

Can you elaborate on what's not correct, and what's the correct way to think about it?