Does that mean you won't have butterflies when to step in front of people? No. You will have them no matter who you are (for the most part).
The key is that when you start playing, the deal about being in front of people should just melt away and you're playing.
I used to be the resident 'gear-trier-outer' at the local guitar store in the 80's...this means I spent too much time hanging out and not buying anything...
I would try out gear in a little trial room with a window. Semi-regularly I would have people/kids pop in to the window just to watch. I mean, I don't know that I was that awesome but i practiced enough where I did ok.
Point is, I was performing though unintentionally.
When it came for my first time in front of a 'real' audience of like 800ish for a 'shredder' competition.....I was nervous as all get out but I learned by sitting in front of a window of onlookers that if I just do what I do and play what I know, I should be ok...and I was.
I didn't win but the guy that did was awesome so......
Moral is that if you know what you play, when it comes time to play it in front of people, you find yourself in that same headspace as when you were sitting at the end of your bed.