Certainly, the first myth is the idea of the "real developer" itself - that creature who knows it all, writing perfect code in the hottest new framework without ever needed to stop and take a break. But this creature is created by these small myths which I will just list the myths here, but you should definitely watch this video.
Myth 1: I as a developer, need to know everything.
Often times half the tools out there are competing tools that do the same thing. So trying to master all of them is a pure waste of time. It is ok to not know everything.
As developers, we can help each other by stoping tool shaming each other. No more "DO YOU STILL USE blah blah... in 2018?" crap.
Also, next time you pick another tool make sure it is because it solves an actual problem you have. Not because it is the next new and big thing.
Myth 2: I need to memorize everything
Taking trivia on syntax will not make you a successful programmer when you have the internet to look up everything you want. It doesn't matter if you don't remember a certain syntax or the difference of some similar methods. Instead, focus on concepts and use resources wisely. Documentations and your peers are your great resources.
"My biggest professional development was getting comfortable admitting what I don't know" @jesslynnrose
PS: Check this hashtag #juniordevforlife
Myth 3: Measure twice before you cut.
That simply is not the case for development. You won't waste any resources, all the pixels on your screen are free and you will learn a lot in the process of trying your own path.
Debugging is much more important than coding.
Myth 4: Share only your finished product for the world.
That is total bullshit, instead show your work, all of it, warts and all. Even this could be valuable to others because you are not just sharing your solution but the process. You would benefit too from feedbacks.
It will be pretty when we get there, but it won't be pretty along the way. Ed Catmull Creative Inc.
Myth 5: I have to code all day, every day.
They want to change the world, but they work all the time. So what exactly do they know about the world(outside) the cloisters of VCs and startup culture Ellen Ullman
Developers can have hobbies, families, and anything that would be considered as a normal life. It is not a trade-off. It is a case of time management and productivity which can actually be harmed by this myth.
Finally take away, you do you. Be yourself and share that with the world. The true real developers are resourceful, accepting and creative. And you don't have to be anyone else to be these things.