Trucks have massive blind spots. I own an elderly cabover and even with better mirrors I can’t see much on that side. Throw in a trailer and I could completely total your vehicle and not even know it.

Years ago I was rear ended in an old farm truck. His bumper got caught under my trailer hitch. I dragged the guy for a bit with him standing on the brakes. I didn’t hear or feel a thing.

Keep in mind a loaded semi or one of those triple axle dump trucks makes anything I’ve driven look like a toy.