Tech moves so fast, you can’t learn everything but that’s not that same as learning nothing. If your are not learning then you are going backwards and actually becoming less valuable..
Even if you learn the wrong thing, you know now that’s not the right path to go down. Variety rather than depth will serve you better..
Find the method that works best for you, and get good at it. For me it’s Kindle samples, they are a great way to skim a topic quickly, especially for non technical business books..