Is lightweight backpacking anti-capitalist?
With all the high tech materials and constant upgrades to the newest lightest gear? Anti-capitalist? Hardly! It isn't unusual to get anti-profit sentiments in a liberal group, but I've found that many of the folk who harbor such leanings don't have a clue about how a business is operated. I think the real sentiment is towards consumer protection and the anti-profit philosophy just happens to come along for the ride.
I have to agree with the general political slant of the UL vs the bushcraft folk. And of course that is a huge generalization. What I see in the bushcraft crowd is a tendency to traditional values, and a love of traditional materials and methods, where the UL hikers will embrace the newest high-tech materials: folk craft vs bleeding edge technology. Some can handle a little of both, some can't. It is very interesting to compare in a sociological sense. I would guess that the demographics would be blue collar and less education for the bushcrafters and white collar and more education for the UL hikers. No right or wrong, just the way things are. Shopping at Cabelas is a different experience than REI, but it is still shopping, and the cash registers still ring :)
As to gear hording, there are UL folk who do that too. It goes with gear heads of any type-- photography, computers, audio gear, bicycles-- you name it.
I've said before that ultralight gear technology is what I call hypermaterialism. It isn't a process of accumulating huge masses of stuff, but it is a micro-examination of your gear, checking the materials and construction techniques, and the performance characteristics.
Take a windshirt as an example. Any clothing manufacturer could make a light windshirt, but for UL hiking, we demand the highest performance along with light weight. It needs to block wind, but still breathe, and it needs to shed moisture, and still breath, and it can't weigh more than X ounces, yet survive stuffing and tree branches and laundering.
It is that extra 10% performance that we will pay an additional 200% or more to get. A 3 cup aluminum pot is $10, yet many will fork out $50 for the titanium equivalent. That is hardly anti-materialist or anti-capitalist. Etc, etc, etc.