Heaven and the hereafter are not part of the space/time continuum that the earth resides in. So there is the very real possibility that when we die and go to heaven we may all be arriving there together instantly at the same “time” (which doesn’t exist there anyway). So there is nobody left behind to watch over and grieve about.
There is no pain or sorrow in heaven, so I don’t fuss about the particulars as I’m sure the God who created the universe has this covered and I won’t understand the physics (if any) anyway.
I share your view.
A big part of being mortal is the concept of time. God would presumably transcend space and time. It also solves the problem that there is some sort of waiting room for souls waiting to be judged. Time disappears and the process happens instantaneously so to speak.