Sometimes. But other times you lose track of people. People get busy, move away, you lose their number, they decided to get off facebook for good, you name it.
Being able to reliably contact someone 100% of the time, 24-7 isn't really realistic in most cases. That having been said, why are we comparing D&D to real life?
I don't generally have to worry about a random encounter with Orcs on my way to the doctor's office. My boss can't hit me with Sending to complain about me or call me into work. On the other hand, if my car breaks down, I can't just cast Mending or Make Whole, I have to pay 130 for a tow and 180-300 (or much more!) for a repair.
My fantasy life can be similar to my real one, but if it's too similar, it's not a fantasy any more!