(4) The advanced civilisations have agreed amongst themselves not to interfere with developing races until they've proved they're mature enough*
*© Gene Roddenberry![]()
(5) Gene Roddenberry and the other members of his advanced civilization actually revealed to us everything we needed to know, but disguised it as fiction so no one would believe it. He broke the Prime Directive, but since we don't believe, no harm has been done.