I am aware crazy people do exist. It's a matter of degree and I would suggest that flying this thought a forest Endor style would be far more dangerous than free solo climbing.
It's more or less like wingsuit flying, just faster and with obstacles much closer. So yeah, I would say orders of magnitude more dangerous than free solo climbing...
Wingsuit flying is pretty well known as a hobby that eventually kills almost everyone who does it. It seems once you start flying as close to rocks as you can for fun there's some sort of skill-risk feedback loop that eventually kills you.
Most wing suit flying is generally far away from obstacles. When they do get close its not many obstacles and it’s carefully planned. Flying FPV through forests is a lot of fun because of how random it is, and how dangerous it feels, but you quickly become aware that the human brain is not set up to do that kind of high speed navigation. There is no traction and flight lines have to be planned a few moves ahead. There is very little margin in the best of times, and sometimes no margin at all. It’s like that ball tracking / hidden monkey experiment. While you are watching one tree another jumps out at you from nowhere. It would be like playing Russian roulette non stop. You’re looking for the intersection of people who are actively suicidal and with a spare $100K.
Yet people still do it (and regularly die) and keep pushing the limits of what we thought was possible.