This may surprise you, but I don't use Python or boto3. Last time I used either of those was nearly half a decade ago. Software I use nowadays generally has much better documentation, not to mention is written in a language where I can get code completions and accurate typings.

Also, I never said that I don't read the source code of third party libraries. In fact, I do. I like to embed third party libraries directly so that I can inspect them inside of my workspace. For almost any library that I use, though, it hardly requires much familiarity to get basic operations working. Since a good amount of the libraries I use at my day job are proprietary, I can't just google for Stack Overflow questions and sometimes documentation isn't always available, so it would be pretty debilitating if I needed a debugger just for the simple task of utilizing a library.

This is also part of why I stopped using Python. MyPy shows promise, but without typings at least on par with TypeScript, my productivity in Python was surprisingly poor despite amazing frameworks like Django and DRF. Simply put, there was almost always too much futzing around, and even with many debugging techniques I sometimes never fully figured out what was wrong with my code.