I don't like tootling along gently listening to the birds.
Then at some level you're a danger seeker too, and more interested in the feeling than in nature. Just a lower level than them.
You can criticize all you like if you back it up with a sensible reason, but to say that their choice of battle is less worthy than yours just seems like stupid reasoning. "He has been seen destroying such and such just so he can do this" – fair enough. "He has put the lives of others at risk by doing this" – fair enough. But bear in mind that you have too by going out biking in adverse conditions. You'll have eroded trails and caused damage to nature too. Its all relative, and to cast him as sad and pointless is a bit odd in my view. If you were a monk practicing silence and protecting nature at all costs I might accept your viewpoint.
Most top anythings are arrogant and selfish on some levels, it comes with the territory. They will have set aside their family life to train (selfish) and will believe they are the best (if they didn't they couldnt win) – they just dont show that side on camera. Others are just unable to hide that side of themselves. I dont think it's attractive either, but I'm not meeting them for a beer so I dont care.
Anyway, I have work to do! Enjoy the argument!