Much more room in the back of a pickup than in that little crate, and the dog can duck down well below the edge. I’d be claustrophobic in that little carrier.
I wouldn’t treat a cat that way, let alone a dog.
Well,the animal has more protection from harm in the carrier. I would never take my beloved kitty to the vet if she wasn’t safe and secure in her carrier with the “live animals’ label on it. She likes it and isn’t overwhelmed or frightened in any way. It’s her safe space.