I mean in general, on average. Of course there are leaders in all causes who care about and work for those causes throughout their lives. Of course there are people for whom age solidifies their dedication, for whom long life has granted perspective and wisdom.
But we're all a bit self-centered, and things that Might Affect Me Directly tend to get nudged up the ladder a bit. Suddenly the SALT deduction limit seems almost as important as abortion rights!