People don't get more conservative as they get older, they get more conservative when they have more to lose. It just so happens that as people get older they tend to get houses, families, long-term careers, etc, which tilts them towards preserving the status quo in amber so as not to threaten what they have.

And if, hypothetically, a generation were to grow up and find themselves unable to afford a home of their own, unable to afford a family, and unable to land a career, they will find themselves with very little to lose and very little incentive to preserve the status quo, regardless of their age.