The 10,000 hours theory talks about the time you need to invest in something before you become an expert in it.
Knowing how to do something well doesn’t imply you also know how to do that thing efficiently.
Efficiency is an outcome of paying attention to detail, being frustrated with the status quo, and knowing how to connect unconnected dots.
Expertise without efficiency makes you boring. Efficiency without expertise makes you lazy.
Boring and/or Lazy,