Can men and women in their fifties still accept new things? I don't know when my family always shirks saying "I don't understand", as if something is wrong.

Not old, but unwilling to accept new things. People of their age are particularly afraid of being cheated! I can't help it As you said, many people around me only know health care, square dance and mahjong every day. Some people in their 80s still go to universities for the aged. You should communicate with them more, let them see more online things, keep pace with the times, live and learn, the more flexible their brains are, and travel more! Enrich their old age.