We think differently as we age. Have you spent any amount of time arguing with old people? You can't teach an old dog new tricks, etc. Ideas tend to propagate

We think differently as we age. Have you spent any amount of time arguing with old people? You can't teach an old dog new tricks, etc. Ideas tend to propagate in generations - it's often necessary for the old guard to die off before a new idea will be accepted, whether this is in art, or science, or politics or whatever. As new people crop up that aren't reputationally invested in a certain idea it allows more ideas to be considered seriously, etc.