Bayes Theorem hardly requires any math notation at all. It would literally take you less than a minute to understand conditional probability.
Yikes.
Yikes.
It doesn't matter how simple the math actually is, if someone is unfamiliar with mathematical notation it's going to be overwhelming to read.
This is a bit like complaining about the existence of books because you never learned how to read.
Bayes Theorem is easily derived algebraically using conditional probability and the chain rule. You can also derive it easily with a Venn diagram. There is barely any notation needed at all here to understand it.
If you're struggling with things at that level, it is more likely due to your own laziness, not because the math is hard. Because it is very easy to reason about.