Agree with the sentiment, but amateur radio isn't the only game in town. I think the key is to pick something that appeals. These days robotics is a good way to get going. Also audio gear is a good choice for the serious listener, or effects/performance electronics for the musician.

What all these have in common is an engaging purpose that focuses learning, and endless challenge that always leads to new learning.

Amateur radio did it for me, and I still maintain a large radiosport station, but for my kid it was robotics that really lit up their eyes.