There is nothing wrong with staying in the game, but the older we get, the more important it is to maintain a reasonable level of fitness relative to how hard you ski. Not only will fitness help you avoid injury, it may help avoid a heart attack.
If you ski with a bunch of old guys, and I am an old guy, at least two of you should have CPR training, just in case. A friend of mine had to be resuscitated in the water and on the platform this past summer. If his ski partner didn’t know CPR, my buddy would have been a goner.