[anonyfox]

Perhaps because all these leaky abstractions help me accomplish a new project/idea in a matter of hours/days instead of weeks/months. And most of the time a "just works" is more than enough, high-performance and perfect understanding of every piece in the involved stack is a waste of time when you have dozens of other projects on your todo-list.

When you finally have a single product that is worth optimizing, then you can dive into the deep details. But mostly you have dozens of throw-away products before you get the lucky one.