From a linked article within that one ^^^
https://www.cbc.ca/news/canada/calgary/alberta-british-columbia-research-yellowstone-to-yukon-trails-1.6724882
"Mountain bikers in particular like to have loops that they can ride, and that's where we typically find the illegal trail building," Schiebel said.
"Social media, it just lights on fire, you know, when somebody has built a new trail and all of a sudden everybody is coming out to try."
Unauthorized trail building is definitely an issue, but there's also the stinking dead albatross of hypocrisy that goes unmentioned when paying blame for habitat destruction on outdoor user groups like mtnb'ers. Resource industries have destroyed far more habitat and will continue to do so than all outdoor rec user groups combined. A good example of the effect of resource extraction has been the near decimation of mountain caribou in BC, in part caused by resource roads, transmission lines and clear cuts that have made it far easier for wolves to track and kill caribou. Besides those roads you have large swaths of territory being destroyed for resource extraction - clear cut logging and oil sands mining being the prominent ones that come to mind. Sure, there's the economic argument that we need all these jobs, but I think the cost we are paying for a lot of these jobs is not worth the economic return when it's weighed against the total environmental impact - which includes our own health.
https://thenarwhal.ca/canada-deep-snow-caribou-vanish/
IMHO we have to start shifting our mindset, away from the Western one that places us as masters of the planet where we can take what we want to one more like an Indigenous view where we are custodians of the planet who are responsible for helping it flourish. I think we can find a much better balance between human wants and desires vs what's in the best interests of all who exist on this land than what we are doing now.