"Instead, dismiss any other rules than yours immediately. Show them that this is your game and they have to play by your rules and not otherwise. Introduce them confidently on your playground."
I think about rules like "you must use version control" and "the test suite must pass before you push to the main repository."
These might be hard and fast rules at one organization, but not another. I interpreted the quoted statement to mean that it's okay for someone from the latter to dismiss a strict "don't break Jenkins" rule immediately.
Using the underlying playground metaphor, that's quickly going to leave the person playing alone in a playground that no one visits.
I prefer the suggestion of the old maxim: "Know the rules before you break them", which is pretty well aligned with your suggestion.
Also, the closing line - "You can be shark or fish. Not both." - is biologically wrong. A shark is a fish. Indeed, I like the metaphor as well: No matter how hard a shark may try, it's still a fish.