I can't understand why people defend improper typography. If you're writing a proper, professional-looking blog post, they think you now should use double-minus -- instead of em-dash to make it look non-AI like, only for that reason?

In Russia, we have many typography keyboards/addons, because, well, it historically looked very silly to use double-minus or "-quotes instead of «»-quotes.

I've no idea how some countries got their typography standardized on the PCs and have it from the very beginning (Germany with their quotes for example), but the other countries need to setup external software and configuration. Apparently, US also didn't got their "third level" keyboard as a standard.