This argument does not carry much weight. Of the five hits we have had this year the only one who was over 90 was Patty Andrews and this was her third appearance on the list.
Just because someone is over 90 there is still a good chance that they will last out the next 12 months. If you are playing a game like the DDP then the age will determine the amount of points that you get for any hits.
I think this is a good list and there are plenty of opportunities to play in your own way.