You have fundamental skills and you have room to play around with them. As in, you have been walking tight ropes (for the sake of example) for decades and its boring, so you try some jumps and runs on it. For them, barely staying on is an issue, so any additional variables is too much cognitive load.
An array wasn't always just "some ordered collection with fixed sequential memory". It was a very specific C# implementation written out as var fooArr = new barType[]. It was confusing that in Python its fooArr = []. "Why is it different? What does it all mean? The syntax is hard to remember. What if this adds errors? I just want my code to work."
You're saying actually the opposite of confidence (hesitancy) is something that might look like complacency to one person but it's actually just being conservative, making sure you stay on that rope. Good point. Thanks!
An array wasn't always just "some ordered collection with fixed sequential memory". It was a very specific C# implementation written out as var fooArr = new barType[]. It was confusing that in Python its fooArr = []. "Why is it different? What does it all mean? The syntax is hard to remember. What if this adds errors? I just want my code to work."