There's nothing to be afraid of, if you let something like this pass. Right? It's just a missed opportunity, if anything.

[But then, what does he know? He's seized at opportunity when it was presented to him, but he also felt like it was the only possible thing to do at the time. And it's happened so rarely.]

I don't think the Wizard would accept a wish like..."I wish none of this had ever happened." [...] I wish all of us were still alive. It's almost the same as...traveling back in time to the start of this.

[Which we evidently aren't allowed to do for some reason.]