Suppose you asked someone what they did for a living and they said, “I am a hammer”. You might find this strange. You might also find it strange for them to say, “I am a table saw”. However it would be quite normal for them to answer saying, “I am a carpenter”.
Far to often we confuse our proficiencies with the tools of our trade with our actual profession. This is not a good outlook. I use the tool not the other way around. I am not the programming language I am the software engineer.
So why bring this topic up? Because anyone who believes they are defined by the skills they have in their tools will be limited by those tools. Remember this when you get the chance to learn something new.