But, as the aphorism points out, there's a gap between reality and your preference. We all have the same number of hours in a day and mastery is relative.
But specialization comes with heavy costs too, which is why cross-training was so trendy in automotive manufacturing for a while.
If folks specialize they often lose the ability to coordinate their actions with eachother.
The way I look at it is that human beings are as bound by the CAP Theorem as computers are, except that humans are fundamentally unable to achieve full consistency. All specialization and generalization needs to be done with that in mind, namely that all knowledge is incredibly local.
But, as the aphorism points out, there's a gap between reality and your preference. We all have the same number of hours in a day and mastery is relative.