The same here. We are in our mid 70's so the old gardeners, we knew lived until their 70-80's. Both of our Grandmothers lived and gardened until their late 70's early 80's. They had live flowers growing up they passed on.
Now, we are seeing the age spread that you noted re gardiners. In fact our county has a great master gardener group. Many are in their late 70's to mid 90's. Besides, their gardens, they are avid walkers and walk year round until the frog drowning rains hit.
My wife is our principal gardiner. She has over 30 thriving roses, glads, and other flowers. She has cattle water troughs, where she raises tomatoes, Kale, arugula and other goodies. A miniature fig tree in a horse watering trough which provides figs from late July to the first frost. She has a prolific miniature Meyer Lemon tree that provides lemons from late July to this month.
Our yard guy does the heavy lifting, hauling and yearly pruning. She and I do the rest. Everything is on a digital controlled drip system to avoid wasting water and letting plants die from not enough water.
One of our adult children, our DIL, one grand child, and I in the summertime are like goats dining on the fresh veggies/fruit.
At dinnertime, my wife sends the goats outside for our salads, while the tenderfeet stay in and eat the same stuff from a salad bowl to their salad plates. For dessert the goat herd goes back outside and picks more figs and the sweet miniature cherry tomatoes.
LOL
I graze in the yard also.
I hope that I can garden every season of my life.