I’ll go first: “You have to have children when you’re young,” told to me when I was in my late 20s, with no desire to ever have kids, and no means to support them, by someone divorced multiple times with at least one adult child who does not speak to them.
Also: Responding to “How do I deal with this problem?” questions with “Oh, don’t worry about it, it’s enough that you’re even thinking about it!”
I’m a Christian but I support the school of thought that says “shit happens”.
Another problem with the thinking “everything happens for a reason” is that it can lead to belief in “the just world”. When one thinks that life is fair you start to believe that bad things only happens to bad people, ie they deserve it.