This is not true. Next time you grab an olive oil bottle read the fine print: unless it’s very expensive it will be a blend of oils from 4-8 countries, ie production doesn’t have to be in the same country where olives grow on olive trees, as you eloquently put.

What's your point? The olive imports from these 4-8 countries will all be tariffed also.

There are a few olive trees in my neighborhood. I should plant some too. It would be fun to watch them grow.

> There are a few olive trees in my neighborhood. I should plant some too.

They are nice trees, but beware you won't be eating the olives unless you put a lot of work in. They have to be de-bittered or "cured", which is done by soaking them in things like caustic soda. https://anrcatalog.ucanr.edu/pdf/8267.pdf

So if you are after a nice compact tree that doesn't need a lot of water, then an olive tree is a good choice. But if you want a garden of Eden fruit tree, there are much better choices.