I think it is probably worth having deep understanding of some things. The reason is that getting that deep understanding will be hard, and doing so will make y

I think it is probably worth having deep understanding of some things. The reason is that getting that deep understanding will be hard, and doing so will make you smarter, not just at that thing but in general. A bit like the enlarged hippocampus of London Cab drivers who have to remember all the streets (being a London Cab driver might be as good as learning networking to a deep level?). Then when you are given something hard to quickly learn, e.g. say you need to go from zero to Kubernetes pro in a week, doing so should be easier. Or even learning the bits that are worth learning to optimize that week so you can be most productive after it, will be easier. It is a different argument than the one about avoiding leaky abstractions.