Worst are the ones where he number is the number of times some random event happened. In that case there's a decent chance the difference is less than twice the square root, so assuming a Poisson distribution you know the difference is insignificant.

Few people bothered to look at the probability distributions the forecasters published which showed decent probabilities for landslide wins in either direction.

Next time you're doing something that isn't a professional STEM job, see how far you can get through your day without adding or multiplying.

Unless you're totting up your score in a board game or something of that ilk, you'll be amazed at how accommodating our society is to people who can't add or multiply.

Sure, when you're in the supermarket you can add up your purchases as you shop, if you want to. But if you don't want to, you can just buy about the same things every week for about the same price. Or keep a rough total of the big items. Or you can put things back once you see the total at the till. Or you can 'click and collect' to know exactly what the bill will be.

You don't see mainstream discussion of variance because 90% of the population don't know WTF a variance is.