No difference between them touching a pump and touching the water controls. Or the shower door. Or housekeeping having to touch the little bottles to put them out or move them. Not sure how touching the pump is any different than touching anything else many hands have been on. Which is something you can't avoid if you leave your house.
Till some kid or drunk adult decides it would be funny to put some urine or maybe something else in one of the bottles; how many groups of teens have their own room? I've seen some, not Disney, hotels with the shared dispenser and the locking screw was just hanging lose.
I always have my own toiletries when I travel, if not, it's not to hard to stop by a local store to pick some up. So it's not that big of a deal to me.