Why are old people so set in their ways? Why are old people, especially in this day, not open to change or open minded at all?

I was talking with a member here about this the other day. It's as if old people have been wrong about things so many years, and it's worked out for them because no one has corrected them, and so they believe it to be true because it works. Even though whatever they believe may not be true!

Your thoughts?