Programmers often discover solutions while explaining a problem to someone else, even to people with no programming knowledge. Describing the code, and comparing to what it actually does, exposes inconsistencies. Explaining a subject also forces the programmer to look at it from new perspectives and can provide a deeper understanding.
You’re not wrong. At work I have the bizarre situation that I have a laptop which is pretty powerful but I’m not allowed to develop on it and have no admin rights on it so I have to remote desktop into a less powerful VDI running in a different country with exactly the same access to company information but I have local admin rights on that machine. Also development is super cumbersome because it’s a windows VDI so I have to use WSL2 for a lot of the things I’m doing. Really weird, inefficient and expensive.