they want political change, not physical change. I can't imagine many young people want to give up a bustling city with lots of culture, dating opportunities and things to do for a place thats cheaper with a slightly lower risk of contracting a virus from pandemics that only come around once or twice in a lifetime

Yes but not the change you are describing. Young people reinvigorating small towns was not one of Bernie's platforms so I don't know how it's relevant.

Young people want change. But they still want to move to cities with things to do while enacting change. Just look at the demographics.