The Prime Directive wasn't mentioned until the 21st episode of the series. Starfleet probably passed that law after reading Kirk's reports.
"The man's a menace." - Stooge at Temporal Anomalies
It's a form of survivorship bias and availability heuristic. All the times a ship goes to a planet and doesn't do anything because of the Prime Directive would make for a terrible episode. We don't get to see every day the Enterprise is just cruising around doing mundane shit.
Then why write in the Prime Directive to begin with?
I think the Prime Directive is misunderstood. It's simply a directive that's wholly divisible only by itself and one.
Brannigans Law is like Brannigans Love...
I don't think the Prime Directive explicitly says you CAN'T have sex with alien women - no matter how primitive their technology is.
As long as you don’t show your alien lover any federation tech you should be fine with any boots knocking. Even if they’re prewarp.
Destroys talking computer with logic
