Look, you not convincing at all. 1. Should I skip books that do not confirm your point of view? 2. What if I already spent time in these companies and found n

Look, you not convincing at all. 1. Should I skip books that do not confirm your point of view? 2. What if I already spent time in these companies and found no big difference? 3. So, why companies that use different approach still exists and even (mamma-mia) profitable?