Crimson Longinus
Legend
1. Practically yes. The medicine skill and per-encounter powers like Lay On Hands means that post-battle healing is cheap(and in battle healing is powerful to balance out swingy damage can be in PF2)
2. The reason some people do 'useless' combat is because PF2 combat is fun even outside of per-day/longterm resource management thinking--one plays PF2 to fight; thinking of action economy, positioning, small-scale resource management... those are a hundred times more exciting than rationing health and spells over the day.
But I though you said having to think is bad? But now it is good? And do you actually need to think if the fight is so easy that victory is guaranteed or are you just going through the motions? I would imagine that in a tactics game fun comes from the challenge, which means that there is real and significant chance of losing. If you cannot lose you cannot truly win either.
3.Yes. Horrific, mengenaskan, kohutav, and a hundred other terms. I'm thankful that pathfinder now at least has a 3pp alternative for vancian in magic+.
That allow you to cast unlimited amount of magic so that you do not need to think whether casting the spell is worth it?