IT is a fast-moving field. Solving business problems takes understanding which good ways to do that are currently available, what limitations and dangers each approach brings, how would it interact with other things, etc.

You still need deep knowledge, but the most efficient knowledge is that of key principles, general approaches and ideas. A specific technology does not matter much, and can be mastered quickly enough, if you already are acquainted with the principles behind it. E.g. learn about FRP, and you will see how React, Elm, and Excel all work along the same lines.

What you end up with after some time is like a normal distribution: deeper knowledge around some area and various levels of acquaintance with a wide range of other things.

There are still areas where you can polish the mastery of one narrow thing to utter perfection: making pizza or coffee, sports like running or weightlifting, etc. You can keep practicing them to counterweight the feeling from the view of the sheer and constantly moving IT landscape.