For the same reason that occasionally, an auto traveling 70+ mph on the highway hits a ‘pedestrian’ or deer. An A36 is a 6-seat complex retract, and final approach is around 70 mph.
Sorry, don’t see how it’s the same. He’s above & should be looking down. I think he should have noticed something unusual near the runway. So he either wasn’t paying attention, or saw something & decided he didn’t want to wait & came in anyway.
Only other possibility is that it was foggy/poor visibility.
I see another poster said that pilots will fly over a runway to make sure it’s clear before landing. I’m guessing he didn’t do that.