Earlier quoted context omitted.
"Nobody..." That's quite broad. How about some specific examples.
Small shops and small hotels in eastern Europe. I simply stopped trying to contact via email after several inquiries without any response. While messengers for some reason are very popular. If I already talking to someone in person and I need to send files to them then in 100% of cases they will ask to send it via some messenger. Latest cases - car insurance asked for photos, notary asked for my passport, legal consu…
Not to discount the speed and convenience of messenging apps, but if someone is playing fast and loose with the law and trying to avoid a "paper trail", then avoiding email and using "ephemeral" messenging might be a strategy.
It was once claimed, by Facebook, that "[1 in 7 people worldwide is on Facebook. More importantly,] 6 out of 7 people are not on Facebook." Perhaps more than 1 in 7 people have an email account. Just a guess.