We went to Italy over the summer, and mask usage was ubiquitous. Nothing fancy, just the basic surgical ones. They are required in schools there because children come into contact with adults.
"Is it worth it" is an ongoing question; at some point, it's probably not, but we're not there just yet. Our vaccination rates are still pretty low. And remember: the bellowing about masks started before we even had vaccines.
It is a political decision to weigh all the various and multiple "facts" and make a value judgement involving tradeoffs of which interests are prioritized and which are subordinated.
It is a political and value judgement to err on the side of minuscule improvement, if any at all, from wearing masks and mandating vaccines for cohorts that statistically don't need to worry about covid, while degrading the social development of children, and hurting the wider economic interests of people affected by endless restrictions. These are all political questions. There are no all encompassing "facts" that delineate who is harmed and who is helped and in what proportions. That is the realm of politics.
"Is it worth it" is an ongoing question; at some point, it's probably not, but we're not there just yet. Our vaccination rates are still pretty low. And remember: the bellowing about masks started before we even had vaccines.