This is really obviously not true. The Democrats' preferred candidate for Maine's US Senate seat, Janet Mills, was 78 years old. She had never served in congress. (she dropped out of the primary when her impending loss became obvious)
That is how voting and elections is supposed to work, not by saying people of a certain age, color, race or creed can't hold office because young people today are bigoted and feel they deserve more than all generations that ever preceded them throughout all of history.
> young people today are bigoted and feel they deserve more than all generations that ever preceded them throughout all of history.
Each generation doing materially better than the previous one used to be a widely agreed upon goal in the United States. Perhaps not really relevant to this comment thread.