Having a business mind is a skill. No skill is developed by tactics alone. Developing a skill at a very elite level requires behavioural changes, mindset shifts and expanding your personality. And it can take years to develop it. If you blindly follow tactics without the proper mindset, you won’t be executing those tactics the way they ought to be executed. Let's take an example: Build, Iterate and Measure are the key concepts of Lean startup. There is nothing wrong with this concept. But let’s dig a few layers deeper to really understand what it means. If you directly apply this concept it will not work.