To have a growth mindset you have to be open-minded. Being open-minded helps you see things from different perspectives and that will help you learn and you need to learn to grow. There are many people today who don't learn, not because they are not opportune to learn, but because they don't take anything that they don't know. What they know is what they know, they don't care about seeing things from different perspectives. You can't grow with that kind of mindset.


I don't think this means you have a fixed mindset. Every single one of us has a flaw, we all have a weakness, but we can't go about advertising those flaws to everybody. We hide them. The difference is some people make a conscious effort to get better while others just accept it like that, or don't even accept at all that that thing is a flaw.
Also, when a flaw is pointed out to some, they pick offense and quickly be on the defensive, while for others, even if it might make you feel uncomfortable, you'll accept what was said and try to get better.