It's definitely a super-dangerous sport, but I know a few guys who have been doing this for a long, long time and understand the risks and keep their egos in check. They have a plan and they have outs. When done right, you are diving hard at the terrain to stay attached to the line, so if anything goes wrong you relax and separate. Some of these people have kids. None of them are morons :)
There is a fairly good reason why proximity wingsuit flyers tend to have a limited life span.
Whether or not you wear a parachute is not very important once you impact a tree or a mountain at high speed.