Taking spare sheets and towels with you is your choice.
Insisting your loved ones do it too is just annoying.
However the reason why we use hotels instead of carting our homes on our backs is so we can travel lightly. We expect them to provide bed linen and towels. Most of us can accept that some of the world's 7bn people might have used the facilities before.
Using handwipes etc isn't a bad policy when you have a cold or there's one going about I guess, but you have to draw the line somewhere.