Okay, I'll admit, I've only read the first 7 pages, but two posters have already mentioned the issue.
It's not about touching the pump bottle, it's about what may just possibly be inside the pump bottle.
Someone who worked in a hotel already said it, someone had pissed in a shampoo bottle! People are fucking disgusting, but worse, some people have weird fetishes. Another mentions other 'surprises' being added to these bottles. To spell it out, we are talking about piss, spit and semen! Especially semen! I believe there are places online that these freaks even post about what they have done, for some sort of added thrill.
I always take my own shampoo and conditioner because I prefer them, but my DH is happy to use the individual bottles or a pump dispenser, as long as the pump dispenser is the sort that is locked to the wall and much harder to tamper with.
Hand was dispensers in public washrooms don't bother me so much as these are fixed to the wall, and usually busy enough that nobody is tampering with them. Pump soap at a friend's place, no issue as I know them and they're not weirdos.
So, it's not the dispenser itself, I'd assume the cleaner has given it a wipe over, it's about the small chance of pumping something out after a fucking weirdo with a fetish has been in there.
That said, I take my preferred shampoo and conditioner with me anyway and none of these options are something I would be basing my review on. I think you just have to let it go OP.