I agree with this.
If all you've got is hustle, you could end up running around like a headless chicken.
It's all about "Action" on the forum I'm a member of, but I've always argued the same thing there. Action + Hustle are definitely needed, but doing it wrong can be a problem. ;-)
I know, because I used to "Hustle" at something that went nowhere.
I can see your point, it's also the other way around. haha. People with slow action can take them decades to get one task done lol :P
Haha!
I think there's probably a sweet spot somewhere.
Too much action and not enough knowledge: Headless Chicken
Not enough action, or not fast enough action: Sloth? :-P