There’s nothing to be reminded of. English has a word to describe North and South America together (“the Americas”). Other languages have different words for the same concept.
It’s like reminding someone they shouldn’t say “bicycle” but should instead say “fahrrad”.
The USAians are largely seemingly already convinced the name of their country starts with an A, those that live elsewhere generally have better geography chops, so you're correct - it's unlikely any minds will change.
We have a similar thing on this side of the Atlantic where people argue about whether it is acceptable to refer to the United Kingdom of Great Britain and Northern Ireland as "Britain". I feel it is, as an abbreviation, and it is my preferred abbreviation, along with "GB", because I like to look forward to the time when we won't have a monarchy any more and I therefore don't like the abbreviation "UK", and also, despite not having any strong Irish connections, I tend to feel that Ireland ought to be reunited. This may seem like the opposite of my opinion on the US/America question, where I prefer "US", and I suppose it is, but I have my reasons!
It’s like reminding someone they shouldn’t say “bicycle” but should instead say “fahrrad”.