I think it's obvious that I'm not advocating you have innate knowledge of everything down to semiconductor fabrication in order to be a competent javascript programmer. I would argue you want at least a basic understanding of the internals of the software you're relying on.
You're writing SQL queries and claim you don't have the time to research how the database you're using works internally without destroying your productivity? You can write SQL without knowing the database's indexing strategy or how it optimizes queries, but it's likely to be of a lesser quality than someone who has taken the time to do so.
You're writing SQL queries and claim you don't have the time to research how the database you're using works internally without destroying your productivity? You can write SQL without knowing the database's indexing strategy or how it optimizes queries, but it's likely to be of a lesser quality than someone who has taken the time to do so.