Ah, but 'should be's' don't help a situation, only escalate it and that's really to be avoided.
I'm envious you have perfect control and perfect command of how to think and act but we aren't all like you I'm afraid.
In my marriage, I have issues because I was raped, DH has issues because both his parent have died and his last remaining link to them is just about to die too. He's not coping.
I could get my judgey pants on and blame him for not being entirely rational or perfectly able to manage his feelings and talk. That won't help matters, it's not reality. I assume the best of him and he does for me.
Likewise, he could get his judgey pants on whenever I go off on one because something's set me off (Eastenders did it for me). Shutting myself off until I can function again means I cope.
I guess the difference is is that we love and respect each other and don't expect perfection. Whatever we do we know it's a coping mechanism, it isn't as a tool to punish or torture as I said upthread. That's abuse!
There's a big difference between a coping mechanism and abuse.
If you've had an argument, stated your case and the other doesn't agree or didn't take the message in (I stop listening in an argument but do listen in a rational debate) then silence until latent understanding kicks in it can be useful. Likewise if understanding doesn't kick in then returning to the topic and debating it, rather than arguing, is needed.
Either way, silence is still preferable than escalating things by pushing.