if you pick up some is dirt plastic wood on the rear tire..it will stick under that #### fender.... and make it turn with the hveel...to it block the hveel ..and you die...
I don't mean to sound rude, but this is untrue and ludicrous. Many Enduro bikes use these fenders currently. IF the tire picked up debris, it would either pass through the fender, sheer off, sheer the fender, and or never make it around the tire far enough to affect the space between them.
To follow your logic, EVERY fender on every bike would potentially run this risk. It just doesn't happen.
You can look at numerous modern bikes, and a huge number of them use this.