> It is surprisingly different to what I'm used to from senior devs, which behave like they always suspect their own work is flawed and half assed

I never trust my own code. And one of the motivations of trying to be fluent with my editor, is to be able to quickly look at it when a bug is reported. I also don’t trust another person with their description of their code. Any surprise, and I’m looking at the source if it’s a available.