Well, if you narrow down the metaphor to just knives, a dull knife is more dangerous to a chef than a sharp knife, because you need to apply more pressure and you get less control over the cutting action.
Dull knives are dangerous to most people, not just chefs. Most beginner's cooking books/lessons will tell you to keep your knives very sharp, because dull knives are dangerous (for the reasons explained by grandparent comment).
This affects amateurs just as much (if not more) as experienced chefs.
Which of the two, "going serverless" or "managing your own servers" would you say is unequivocally like juggling katanas?
I don't think the analogy is very good, since juggling katanas is always a crazy idea, while choosing whether to go serverless or not is always a respectable discussion.
