The batter is beaten thoroughly and poured into a tin and into a 350 degree oven The timer is set for 15 minutes. The mixer is cleaned up and put away. The counter clean...
Wait. What is this baking powder doing here unopened?
I forgot to put in the baking powder. Grrrr. Well, it's only a teaspoon in that big ol' batch of sugar and flour and eggs and butter. What harm will come if I don't get it in there?
And that is how a lot of people run their lives. They want to make a thing. They get 80-90% of the way there, and then realize they've made an ever-so-slight error. And yet, they don't fix it or start over. They don't fix it. They don't start over.
That's one easy way to fail, we'll call that not respecting Chemistry. There's a reason baking powder is added and it isn't for the taste. It's the chemical reaction.
If we don't know how Chemistry works, we won't know about the chemical reactions required to make our recipe a success. When we do know what will happen either through deductive reasoning or from a previous experience, we may be willing to immediately start fresh. So, you either need to have a broad understanding of how things work ( the Chemistry path ) or, you need to get a lot of experience.
Where are you in life? "Oh well." or "Start fresh?"