Great comment. For the article writer it seemed like a numbers game or checklist. Learn X languages (whatever 'learn' means here) or read X number of books. IME, what you learn and read is more important than the raw numbers.

I'm selective in what I will devote a large amount of time doing. If I'm reading a book for something other than downtime enjoyment, I want to make sure it's a book that I will get something useful out of (bonus points to books that provide enjoyment and usefulness).

Breadth of knowledge is useful, but someone also needs depth in something.