A the core of the two jeremiads are two core fallacies and a slew of ridiculous statements such as bike chains are too noisy (yet too quiet for bears to notice) or bikes are kinetically powered, whatever than means. I was tempted to just ignore them since they aren't that original. If you have read an article opposing bikes in the backcountry you have probably read something similar. After the first article I had a spirited interaction with the author in the Facebook comments (which to their credit they had not deleted when I last checked) where I asked to to provide some evidence to back up his allegations. Instead I got links to Outside Magazine Articles and to a You Tube video of a lift served downhill mountain biker at Jackson Hole.
"when you are mountain biking, you are making tracks along steep trails strewn with rocks and have little time to admire the scenery; you are staring over handlebars toward the ground...while fast tracking through the Teton Wilderness, you don’t have time to reflect on the needs of the grizzly, the wolf or even other wilderness travelers; the focus is on yourself and the track a few yards ahead."