Oh I don't know, classes 5 days a week for the whole summer in addition to working a full-time job while simultaneously trying to sell a house in a really shitty market?
Not everyone has the luxury, nor the cash to take off for a week or two in the summer and ski.
My dad is in his fifties also, he took 4 motorcycle trips and numerous vacations this year. When you get that old you have the money, and the time to do shit.
When you are young enough to take full advantage of a freeride camp, you usually don't have enough money to do camp, unless your parents pay for it, or you commit your whole life to skiing.