Which Star Trek was "trusting the viewer to draw their own conclusions"?
Was it the one where Kirk used "half-breed" as an insult so horrible and hurtful that it would reveal an android as an imposter (in a period where segregation was still legal in the US)?
Was it the one about a long-standing war between two peoples based entirely on the color of their skin?
How about the one with the Nazi planet?
Surely you're not referring to the one with the first interracial kiss - something so political that the network debated censoring it and caused Shatner to intentionally ruin takes of an alternative version?
Are you talking about the one which involved Kirk explicitly promoting contraception and calls out the hypocrisy of the self-proclaimed "pro-life" alien race?
No, perhaps you're thinking of the one involving the torture of the leader of a revolutionary group.
It was probably the one where Picard refused to play god for an alien race because religion was a primitive superstition.
Or the one where they recover cryogenically frozen people from the 20th century and Picard shits on a venture capitalist.
Or the one where an alien race is outcast because they don't conform to gender norms and this is a bad thing.
Or the one where an admiral starts a witch-hunt on board the Enterprise trying to weed out a conspiracy and Picard goes into an anti-fascist rant.
Or the episode of DS9 that takes place during the 1950s where Sisko experiences racial segregation, and Star Trek is a sci-fi story he can't sell about a future he wants to live in.
Or the one that establishes the Bell Riots, a widespread anti-capitalist revolt that takes place among the homeless and immigrant populations.
"Patterns of Force" was broadcast within living memory of WW2; that the Ekosians were villains was as uncontroversial as water being wet. I always suspected they went with the WW2 German uniforms for the bad guys for that episode because they could rent them cheap (there were plenty of WW2 movies filmed in that era) to save on budget.
And the crew kissed aliens aplenty; an interspecies kiss was surely much worse than an interracial kiss to those who were uptight about such things.