Worthwhile interpretations of that quote:
- "Learning a wide range of skills is useful and can let you combine them in ways others cannot."
- "You should not let your current path in life unduly limit your curiosity."
- "Sometimes life throws a curveball at you and a wide range of skills can unexpectedly be very handy."
- "There is a small subset of this list which, as an adult, you really should know how to do."
Unhealthy interpretations of that quote:
- "You are as unworthy as an insect if you specialise."
- "Time spent on one thing does not come at the cost of time spent on other things. You can manufacture time."
- "Developing a deeper understanding of a craft you're deeply curious about is not worth the time you give up learning other things."
- "A person who knows how to do all of this list of things competently has ever existed in human history."
(I assert that any person who has competently planned an invasion and died gallantly in the age where they had access to program a computer would be listed on wikipedia.)
(Also, if people didn't sometimes need specialised knowledge to make competent decisions, then central economic planning would have a hope of working.)