The plan doesn't stop you from getting punched in the face, it tells you what to do next.Your plan didn’t prevent you from getting pummeled. Perhaps your plan, like infinite gamma, was shit. Maybe acting within the plan was responsible for you getting punched. Maybe your plan is garbage.
The thing is that if you have a plan and the discipline to follow your plan then you soon find out if you are getting punched in the face because of the plan or because of the trader.