When the pandemic started, the point of distancing and masking was to flatten the curve as to not overwhelm hospitals. It seems like the mindset changed at some point to do all these things to avoid getting sick. As of now it seems like said curve has flattened and hospitals are no longer getting overwhelmed so maybe that was taken into account into the decision making?
Yes, this is pretty much the driving factor in all large scale public health decisions.
People will still get sick. Some will die. But it's not possible to completely stop that from happening. We have to accept a certain amount of this illness in circulation for the rest of our lives, unfortunately. It will never be eradicated.