I started doing freelance web design 10 years ago. Right from the start I offered to teach any of my three daughters the craft, but not one of them was interested. I finally had to quit truck driving after 31 years because my business grew too large to be a sideline. I have tried to hire young people as subcontractors, but they aren't dependable enough. I have clients who depend on me, and I can't chance letting them down.
Mrs. Chandler is sitting at her computer now learning graphic editing, and I have her retired sister doing copy writing for me.
Older workers have a sense of what business is all about.
The simple fact is that most kids aren't at all motivated. Once older they gain motivation as they need to eat and generally have fewer choices.
However there is always a core group of motivated kids (about 10%). If you aren't seeing them your job is unattractive to them. Get used to working with what is actually available.
That is pretty cool.