The reason I've seen most people most people willing to sacrifice her is that they don't like or understand her character. It's easy to paint her in a negative light because she pushes people away and comes off as selfish. But those are her just her defense mechanisms. We learn that she is in a lot of pain and by the end we can see her true character more in her love for Max and willingness to sacrifice herself to try to make everything right.

I think my rationale on the situation comes from making the choice in that exact moment. In hindsight, it is easy to say that sacrificing Chloe more or less fixes everything, and it even feels like the more ethical choice. Actually putting myself in that situation without all this extra information is what does it for me. Going back and stopping herself from using her powers certainly seems like a good answer, if it even is her actions that caused a storm. But at that point it's just wishful thinking. Maybe it would right all her wrongs and free her from the results of her decisions. But she can't know that it will solve anything. All her attempts to fix everything is exactly what lead up to this. It feels like asking herself to gamble with fate again. This time the price being Chloe's life. It's also easy to insert your own feelings if you don't like or understand Chloe's character. But the story gives us enough information to know that, to Max, she is the most important person.

So for me it's not the question of one life versus many that I see people asking themselves. It is would I rather gamble my best friends life on another attempt to fix everything or hold on to them as tight as I can and accept the consequences of my actions.