I disagree.
All those lives you talk about? They are a memory in some guys head.
The instant anyone goes back in time, unless the universe works harry potter style where there is one timeline that is permanently consistent, everything in the future doesn't cease to exist, it never existed in the first place.
It becomes one of the infinite potential futures that are in the possibility space of the present time.
Just because the present timeline now connects to different one of the infinite possibilities, doesn't mean anyone has died; people just failed to exist.
I mean, every time you make a decision or a quark spins up instead of down, a timeline fails to actualize and all those potential people don't exist. You can't say that they're dead; because to die you have to live first.
It's interesting that you argue about this, because that's one of the only interesting things about this whole timeline arc - TimeTrapper!Paul is working as hard as he can to keep all of his friends and loved ones alive from that timeline, and like the true Orange Lantern that he is deep down, he's having to wipe out billions in alternate timelines to do it, to keep the people he
wants alive. As a meta-commentary about the time travel conceit, WTR is trying to say that someone should think about those things in situations or plotlines like these, because it's abundantly clear that Mandate!Paul's fate is a tragic one. Not just because he can't visit the people he loves, but also because of the lives that he'll have to destroy attempting it.
All that said, individual people living their ordinary lives every day must, as you said, be choosing things that will led to different choices, that will cause others to come into being and others to not. It happens every second of every day and it has from the start of the Universe, and it will until the end. I'm not morally culpable for those lives - if we all felt that we were, we would undoubtedly go insane.
Imagine, for a moment, that MAD happens tomorrow. The few hundred thousand surviving members of humanity live on. Every child, every grandchild, every great-grandchild born in over a few generations has to survive and rebuild most of society from the ground up. There are good moments among the bad, but humanity as a whole lives bleak lives compared to the world that we have today. Eventually, many many years from now, society begins anew, but with a population in millions, not billions. And, in that moment, someone makes a breakthrough - a time machine! Actual time travel is possible and achievable!
So, they go back in time to today's date and intervene before it's too late. Society continues, thanks to their actions, and because of some sort of exit to causality, the time travelers who went back are immune to the changes, remembering everything that happened to the Earth and to their lives before, while getting to see humanity's more successful future, with happier, more positive lives. They can visit the time and date from which they left, but none of the people that they knew are alive anymore.
Those time travelers have almost certainly saved humanity's progress as a species, but at what cost? Individually, these time travelers remember the people they left behind. They can live on for them, but they have undoubtedly prevented countless lives from existing, and they WOULD have existed if not for
their actions. Their own family members, their friends, their colleagues are effectively dead in their minds, to them, and
that's why they feel that responsibility. Maybe they were in a horrible place, a horrible society, but all that doesn't erase the good and the positivity that those individuals experienced, beyond just their personal experiences.
...
I'll say this about the arc, Zoat. You got me to think about the moral implications of time travel in a different way than I did before, and if that was your intention, then it worked on that level.