Your first paragraph is why this transport bothers me.
There's just something so low effort about that.
We all know that they didn't build a real train for Hogwart's, and I certainly understand guests aren't seeing the outside of the Halcyon transport, so no need to theme it.
But it's a darned straight truck.
When we first speculated as to how guests would get from the ship to the park, I figured Disney would lay down a rail or a track - something like that.
Something built for the purpose, and yes - it could have been pulled by cables.
It wouldn't bother me if I were a guest at those prices, and that's what the transport was.
But, an off the shelf truck?
That bothers me.