You should setup your do no disturb settings so you don't get those when sleeping. You should do this even with timezones still in use. Sleep is important.
Emergency calls from the police, hospital, your father-in-law’s neighbor, or other number not in your contact database are often even more important than sleep.
But the damn robocallers have destroyed the primary use case of telephones. When I was a kid the phone was for “important” stuff, and “tying up the phone” with an unimportant conversation or 1200 baud modem was frowned upon.
