The Prime Directive is not a bad idea when it exists to minimise harm.
When it gets turned into a pseudo-religious dogma, where it is considered better to allow a culture to be extinguished than to risk contaminating it, that's when there are problems for me.
I'd say there's a difference between a "sovereign power" and a single being occupying a cave with a bunch of eggs. Plus, interfering with internal politics and simply making contact are different things.