I'm in the boat owners under 35 crowd. I've been sailing since I was 8 months old.
Some just aren't interested in the work it takes. How many people used to do their own tune ups on cars vs nowadays? I know more people who don't know how to change a tire than do. It's too much work to know that.
Recent generations are more interested in quick status symbols. Shiny and loud is what's important. Iphones, new car, new house, xbox, etc. They want a quick return on things and sailing has a bigger learning curve than these other gadgets.
I have a preowned house, a preowned truck, no iphone...
But I have two boats. One I can go fly across the water in, get wet, capsize, and use it to shock all the powerboaters when they see a wind powered vessel on a plane for the first time. The other I could easily take five or six out for a cruise, serve them dinner or I could live on it.
If I can do it, anyone who wants
It's all about priorities. Some things are easier than others.
People still want to go sailing, but it's a little harder to get out there than it is to log on to facebook so all they ever say is, "I've always wanted to go sailing" and it never changes.
Let them stay on land, I say. It's one less boat that will be neglected.