What is the point of striving? It is to gain something you don't possess. Work is striving towards a gain, a goal. You work and get paid.
Not sure of the reference but in this case with action there are consequences for others. The more you do, the more you strive for, there is less for others. The more you gain then the less there is for others to attain.
Laziness / idleness is anti-work; it is anti-striving. Idleness's purpose is to not have a purpose. Does that make it wasted?
If one contains all that is needed, why would one want more?
If one does not want more, then why not allow others to attain what they strive for?
Of course, she could be pointing out that while attaining an enlightened state he may not need anything more, but to spend time encouraging others would not be striving for anything other than fellowship and enlightenment. He did use the convenience of enlightenment more than he should have.