1 – i know plenty of singles who are never alone for shabbos/YT. I’ve heard of it as an issue, but there are people who invite guests…i don’t really understand it.
In Yeshiva we had some old singles, who either worked half of the day or were in Yeshiva full time. They were far from alone.
A single man can join a learning program or get himself involved in community activities. Isolation isn’t really an issue that needs to be a hardship in the frum community.
I don’t know how many family people feel “appreciated” either – as a teacher, i feel extremely unappreciated, or rather i would if i let others’ opinions determine my self esteem