Darius, I understood that part, but in those two countries where I did use local eSIMs (UAE and Armenia) there was no option to buy an eSIM online. Or maybe I didn't know where to look. There are those "traveler" SIM cards that abuse data roaming (example), these can be bought online, but real local carriers are always cheaper.
@grishka I mean if a thing is not available then it will not be useful. I am not sure what we are talking about now.