This is a highly debated subject within the community. A lot of people specifically prefer trad climbing for this reason, and even then, things happen like huckleberry mentioned. Precautions are taken and inspections are done by parks to avoid damage, but a lot of sport climbing routes were bolted decades ago, when this kind of thing wasn’t in popular thought. All of that said, incidents like what he’s saying are usually really rare and by comparison to the face/mountain they’re on, really small. All outdoor recreation comes at some sort of environmental cost. Boats drop thousands of gallons of oil into the ocean every year, we displace wildlife to dig and build golf courses, etc. the climbing community is super conscientious about lessening its footprint these days, though, like all things boomer generation, that wasn’t always the case.