We know what is said, but practically, what was the biggest advantage of acquiring the PMP certification as per your experience?

I will feel confident that I know the processes, process groups, knowledge areas, tools & techniques and inputs & outputs well that I will be able to• think quickly &  be more decisive•maintain more effective project management documents, plans and baselines• be able to calculate all EVM at a moment's notice• be able to do resource leveling, funding reconciliation• lead teams more effectively• be able to manage costs and schedules• provide leadership and direction to my team