The chef brings creativity to their cooking. They create recipes.
When I cook, I generally follow, or stick to recipes.
I could try to create, but my knowledge of base level things such as matching ingredients, flavours or cooking methods is limited. To really make it worthwhile – to be able to improvise, would require a lot of time investment, experience, or research in the basics.
Exercise or training is the same. If you want to build strength and complex skills, to “feel” your way through it is a great theory. However, you need to really, really research the basics.
If your main work or time is invested elsewhere, then there is a huge advantage in finding the expert, trusting them, showing up and simply following the recipe (program) that creates great results.
