We are witnessing scenes of torture and we are supposed to be uncomfortable.
The "stand by your leader" philosophy of "The Tholian Web" only works in the TOS world of generally responsible adults.
Burying our heads in the sand is a path to ruin, when we should, instead, reach for the sky.
"Only a fool fights in a burning house."
If the welcome mat says "Back Off," you should definitely do that.
What we call "ugly" is often just unfamiliar and misunderstood.
We're reminded more than once that evil needs help in order to flourish.
Why did the obelisk-builders leave this world-saving knowledge with only one person?
In some ways, the episode is reminiscent of Mission: Impossible, which, like Star Trek, began its third season in the fall of 1968.
There's nothing wrong, once in a while, with a little mindless entertainment.