That's just the thing. Kids don't look at it as an "accomplishment" to reduce pack weight. They don't even see it as a hobby. That's something us old farts do because we are sick of feeling the pain from heavy backpacks yet are still stuck in traditional backpacking philosophy. So we have to "work" to break ourselves from the habit of needing to bring a bunch of heavy equipment, or else we don't want to give up the luxuries so we spend countless hours spreadsheeting our gear and researching lighter alternatives, only to make a purchase, and then find an even lighter alternative. What that boils down to is a whole bunch of nitpicking, and pedaanticism that gets in the way of just having fun on a backpacking trip.
For the money side of it, my understanding of ultralight gear is that most of the more inexpensive ultralight gear is not durable enough to survive the way young boy scouts treat their gear. Correct me if I'm wrong...