It just comes down to whether or not you (in general, not you specifically) want to take the risk, however small and slim that is, of potentially getting infected and spreading it to your unvaccinated kids and family members. For some, it is a small enough risk they are comfortable to resume life as normal while it still isn't small enough for others.
My personal view is that a mask is a small thing to reduce that already small risk even further. I wouldn't want to see anybody I care about get covid, even if they don't go to the hospital, there's always the long haul risk (which I think is more common in people who exhibited milder symptoms while infected) and the long term damage covid can do to your body.
I agree with you that covid is going to be one of those things that will be around for a long, long time, if not forever. But I will feel better about going maskless everywhere when everyone, young and old, can get vaccinated for it.