> You have no way to know that “our experience of life is always changing.”

The experience we have is always changing, even if our material condition stay the same. That's what I mean here.

> Maybe the people who died on the bridge would’ve hated surviving?

Sure, at that moment, but what about 3 days later, or 3 months, who can tell?

So, my argument here is in life, nothing is permanent, while death is.