I absolutely wasn't attempting to belittle you previously - I certainly accept that promotion isn't for everyone, I just suggested that had you done promotion, you wouldn't be advising others to not worry about this kind of detail. Because anyone who had been assessed would know that these things do matter, both to assessors and to your ability to sell confidence in your decisions. Players know they're supposed to leave the pitch after an injury - if they see a ref who appears not to know that's the law, they might start to wonder what else he doesn't know as well.
But this is an interesting post. It's nice to have a bit of confidence, and I certainly remember being an unassessed L7 and assuming I'd be great at 4 and above. But if you really think you would have pissed 4-3 without a solid grounding in the basics of the LOTG and experience in applying it, then I'd have to politely suggest that some of that confidence may be a little misplaced. This stuff matters, and you can't just turn it on or off at will and expect to get it right when you need to.