The point behind masks is to slow the contagion so hospitals don't get overwhelmed, for the vaxxed ironically it's become the "Wu Flu" with about the same mortality rate, for the vulnerable and vax resistant it has become a death lottery and inevitable. I believe 80% of the fully mRNA vaxxed don't get covid or get asymptomatic cases, around 20% get the "Wu Flu" and of those a miniscule number are hospitalized, much less die.
There are still plenty of targets of opportunity for delta, kids among them, we are not fully rolled out on our vaccinations in Canada and plenty of people need a second dose. Delta has also driven up the rate of first dose vaccinations in the past couple of weeks. We can get to an 85% vaccination rate among the eligible in Canada, even without employer mandates that will also be coming when the vaccines are out of EUA.
We just need a bit more time to pull it off and without masks and NPIs the infection rate will be exponential, as we have seen in the red states. Right now it's mostly about overwhelming the healthcare system and slowing down the spread of delta as best we can. Even kids could be given the vaccine by fall or year end, but at the rate delta is moving through society I figure most folks in the states will have been exposed in a couple of months, it will be much longer with masks and NPIs and give us time to vax to the max at least.