This is exactly the type of thinking that essentially leads to mediocrity in life. But hey, if you're happy with mediocrity, go with that.
People who use affirmations obviously realize they are not the things they consist of in the affirmation. They don't go around with a sense of entitlement. They construe these statements as merely a tool to shift the paradigm of their internal thought process. In psychology, narcissism is ACTIVELY displayed on the conscious level, so there is a huge difference. Before you go throwing around blanket terms, i think you should realize what the terms actually entail.
It's a tool to shift the subconscious which is incapable of cognitive function and deciphering reality from truth. So whatever message is delivered, it will manifest on a subconscious level which ultimately results in the gearing of your actions or autopilot. You never actually THINK about these things. they just occur.
The fact successful people use affirmations as well as goal setting (concrete goal setting...as in SMART goals. Specific, measurable, attainable, realistic and timely/timeframe) is not a coincidence. Success has to start internally or else you either fall into it by accident (i.e. some people achieve what might be deemed success from an external standpoint though fear.... i.e. fear of being poor, fear of being not good enough) or spin your wheels trying to achieve it. in the case of fear driven success, to most people in that position it's not really success. They may have worked really hard in order to avoid their fear, but that doesn't mean they "feel" like a success even though by society's standards they have a great job and a lot of money.
Only about 1-2% of the population writes their goals down in the proper manner or looks at them on a regular basis. Maybe half that use affirmations. Guess how many people in the world are usually considered successful?