You are trivializing what is an actual worldwide issue: even in democratic countries the young are completely not represented. Not “underrepresented”, not represented
at all. It’s a massive, massive problem that very few countries actually tried to tackle. The young are the future, but governments can (and mostly do) completely ignore their needs, and simply run everything into the metaphorical ground - they’ll be gone by the time the real impact of their choices will be apparent, anyway.
This dovetails nicely with another big problem of most political systems: the cursus honorum for politicians is often very slow, meaning that, by the time a person gets to call the shots, the world has already changed significantly. This could simply be considered folklore when the world moved slowly, but we’ve effectively lost that luxury about 100 years ago. And when we go the other way, and elect mid-life people, we end up with revolving-door issues and poor selection criteria (looks over brains etc).
So yeah, age-representation is a big unsolved problem of democratic government.