Being taught has the advantage that you don’t have to go through to process of trail-and-error. Instead of figuring out things yourself, you leverage the experience of those that have come before you. The result is an accelerated learning path.
Developing a process is instrumental when growing a company. They ensure consistency and ideally keep people from making mistakes that others made before. Processes should never be set in stone. They should allow for sufficient interpretation while still being specific.