@Albiboba of course you don’t have to use them if your circumstances don’t allow. But I don’t carry water, I literally have a waterproof bag of damp wipes and another one for dirty ones for the wash. It’s no bigger than carrying a bag of disposable wipes. I’m not dandering around with a Tupperware full of water. I use them out and about all the time, it’s really not a big hassle.
But travelling, yes, without access to a washing machine I can see how that would be a bit more awkward. However just because your personal circumstances mean that you can’t/don’t wish to use them, it may be a viable option for many people, so shouldn’t be dismissed.
Also, I work full time, and my father in law who does some childminding and is in his late 60s gets on fine with using them, as do nursery.