Well, that's true on the face of it. But, at least where I live, this service can be hit-and-miss. The retailer of both my dishwasher and washing machine provided this service, and both times it was a shoddy job.

On the dishwasher, they had a hard time routing the hoses properly, so the unit was sticking out something like 3 cm from under the furniture. I had to redo it myself.

On the washing machine, they routed one of the pipes with too narrow an angle, so that the water wouldn't come out. Fortunately, to the point of this post, the machine was "smart" enough to figure this out and complain about it (via a code on its display).