Well, apologies if I think kids being encouraged to go to libraries is more important than grown ups who can go _anywhere_ refusing to finding somewhere to read.
What kids should be encouraged to do is not merely attend a library as if simply being there is an end in itself, but to learn to appreciate and enjoy quiet, reflective learning.
I agree, children should be taught this. When I was a kid, the sanctity of quiet of the library was absolute. It was a special place. In a world where there's a screen literally everywhere you go, we should value the last quiet place rather than destroy it.
My 4 and 7 year olds do, my 10 month old doesn't, and I'd still like to be able to go to the library (and yay, I can, because we have nice libraries here that aren't full of aggressively shushy weirdos). Plus _I_ want to be able to talk in a library, about what books we want, about what words mean, about chess moves, whatever. It's just wrong to exclude people from a space because you want a free, quiet office, and I'm glad that more and more libraries agree.