I feel like there’s a cultural difference between people in this thread. I’ve lived and worked in 3 different countries and I can say that in one , you absolutely don’t need to tell anyone that it’s ok to break rules sometimes. They’ll do that without your advice, you can be sure of that! In others, only a small percentage of people will, specially when they are inexperienced and fear the consequences more than would be warranted in reality. Perhaps that’s the biggest culture difference I’ve noticed.

Sure, FYI I am teaching Germany. Not exactly known to be a country of rule breakers, in fact more like the opposite. But rules that you don't know are easy to break.

E.g. beginners with electrical wiring may or may not know what is up to code and what isn't and thus violate said code without knowing it.

To know when certain rules can be bent or broken usually requires a deep understanding for why the rules exist and what they are meant to prevent. Beginners do not have that knowledge and thus I'd hessitate to give any general advice to skip rules to them, unless it is extremely specific and tied to one specific situation.

Usually the more useful advice to beginners is when to ignore conventions and how everybody is doing it and when to just use the boring stuff.