I guess I'm very confused by people not thinking the guy at first was a huge deal. It kind of was, due to the lead.
I think you are misunderstanding.
My understanding is that stealing/leading was meaningless and there was no point in taking any risk of being picked off.
If the guy at the plate gets a hit the guy on first goes to second, even if he is not leading, stealing second or getting to third on a base hit does nothing for the team. If the guy at the plate gets home they tie the game. If the guy on first gets home two batters before the guy hitting gets home or on the same hitter it doesn't matter.