Here is my thought- if there was a button of some sort on our bodies that would make us ovluate. You press the button and within a week you ovulate. Then there would be no guesswork- you would know, I’ve got a week to get it on then you O and you wait.
Instead, you have to chart, monitor, and put a wish in the wind that you’ve timed right. You still have to wait, but I think the waiting after an O is easier than the wait before.