I wonder if the graph changed significantly since covid. I have a friend in his mid 60s for whom texting with friends is his only contact with people since his relationship with his girlfriend ended two years ago. He hardly leaves his apartment, and rarely speaks on the phone.
Does your friend think that his style of life is fine, or does he wish for something different? An older relative of mine is alone almost 24/7, every day of the week, and is very lonely.
There is a lot of "informal economy" in India which may be contributing to this. Also, very few women are in the workforce.
There's a great tongue in cheek economics explained video about how if we want to improve economic output by getting more people into the workforce, handing out free washing machines is probably the best way to do it. It frees up the time of the people in these societies who are traditionally relegated to housework, so they can then participate in the economy and have jobs. https://www.youtube.com/watch?v=_gvsz_vc7B0