The original argument is what I consider one of the biggest beginner mistakes. So the inexperience argument is very much relevant. I was young and inexperience

The original argument is what I consider one of the biggest beginner mistakes. So the inexperience argument is very much relevant. I was young and inexperienced once, and I had the same belief. But after bumping my head against the wall, I learned. In the mean time, I saw plenty of people bumping their head against the same wall. They all learned. So therefore I assume this person is indeed inexperienced. If I'm talking to some senior developer, then it's up to me to reassess my way of thinking, and looking where I'm missing something. But if not, then it's just the phase we all went through.