Since my late teens, I have spent ~6 months a year traveling the world, and language learning has been a big part of that. And now I am in my 40s having seen how, in most regions, interest from locals in intensive conversation steadily diminished as I approached middle age. So, my experience has been comprehensive enough to make such a blanket statement.
When you are "home", do you have the same problem? I wonder if people are becoming less social overall?
I also wonder if it is something that happens for women as well, or just men.