There is a big difference between taking care of yourself physically and being a narcissist.  

As just one example, Trump is a classic narcissist, and considers himself to be extraordinarily handsome.  I'm not aware that he does much of anything to take care of himself, aside from screwing over other people in business; certainly he seems to do little to actually stay in shape.  They are two different things.

"Who wants to be "normal" anyway?"

Right there with you here.  Normality is highly overrated.  "Normal" is only a range of behaviors, in any case, which people tend to forget.