Not a skydiver but I would think that with no wingsuit your ability to track and adjust course would be limited. Like being 5000 feet out and realizing you missed. Like being a quarter mile away from the power lines in a descending hot air balloon.
A skydiver can steer and track pretty well, even without a wing suit. I don't remember the "glide" ratio, but there was some ability. In this case, I think he dropped from directly above the net, correcting for any wind, and got on target early and kept himself there.