Actually poor assumptions

Millennials and Gen Z make up the largest portion of the voting population (roughly 35%)
They are also more diverse than any other voting block.

Not saying that middle aged and older voters are not a strong voting block but they are the minority now.
(Receipts: https://www.pewsocialtrends.org/essay/an-early-look-at-the-2020-electorate/)

The presumption that their objectives and vision for the future can be delayed or subjugated is foolish at best, self destructive at worst.
Their concerns are rejected and disregarded at Democrats peril.
We are playing to middle ground that is smaller, not larger.
We need to stop living in the past. We have to start looking for new leaders among us and draw on the wisdom of those that came before them.

Playing it safe is not what helped us win the House in 2018. Fresh faces and innovative ideas are what that possible.