What does it mean to be "lazy"? Why are some people lazy, and others not? Why are people lazy with regards to certain things and not others?
Ignoring all of these questions and simply considering laziness to be a fundamentally characteristic is highly unsatisfying and, dare I say, lazy.
Maybe the authors explanation is wrong, but she offers a potential explanation. Your proposal is simply that 'she is lazy because she is lazy' which offers no explanatory power.
A few months ago my little brother was taking an introductory CS class. I warned him not to procrastinate his assignments, because you can't hurry programming. Nine women can't make a baby in one month, etc.
I think "laziness" is similar: it's an emergent phenomenon to be debugged, not a single "thing" to be attacked with more-of something.
Ignoring all of these questions and simply considering laziness to be a fundamentally characteristic is highly unsatisfying and, dare I say, lazy.
Maybe the authors explanation is wrong, but she offers a potential explanation. Your proposal is simply that 'she is lazy because she is lazy' which offers no explanatory power.