I don't know about snobbery. Certainly a lot of poorly informed / uninformed comments.
I'm probably one of the "chippiest" posters on here. Take it or leave it as far as my comments are concerned. BSES inspired me to do a geology degree, based on the scientific fieldwork aspect, and that is still part of my career today. I came to BSES from a comp, as had the previous people who I knew and inspired me to apply. I went back as a leader because I wanted to pass on some of the professional field science skills I had subsequently acquired during my career.
As for the holiday bit? Well I never thought carrying 80-100 pound packs for several days, including all your food, fuel, camping, survival and science kit as a holiday. More like a military operation perhaps?
I can see the temptation of looking at this as some gap year jaunt for rich kids. The gap year Market is one that BSES has to compete in, but the reality is (was?) that they precede that Market / fashion by about 50-60 years, and offer something quite different