Why? Because most probably he will:
- Work on processes, not on value creation
- Be responsible for a certain centralized function: IT, Dev, PMO, Process Improvement department; which is not valuable without others (or just not valuable and gives overhead)
- Try to coordinate communication among different teams
- Have desire to push down decisions
- Have own goals
But you need leaders who will:
- Help to form cross-functional teams and delegate decisions to them
- Make information transparent and easily accessible
- Encourage collaboration
- Focus on value creation, not process improvements
- Build shared goals