OK great, that's pro bakers who are presumably selling what they're producing, and need 100% consistency. I make bread weekly, and it turns out great weekly (for our home consumption). I'm constantly experimenting with different balances of whole wheat and white, different brands of flour, different amounts of leaven, different percentages of hydration, etc. If I hadn't experimented I wouldn't understand bread as well as I do. Dough, like pan cooking, is very forgiving if you understand what you are looking for.
"Follow the recipe" is an awful philosophy. Learn the recipe and then improvise is much better, because it helps you understand the domain much more significantly.