Any series of only 79 shows that ran the gambit of quality from strong dramatic episodes like "Balance of Terror", "Journey to Babel", and "The Immunity Syndrome" to fun stories like "The Trouble with Tribbles", "A Piece of the Action", and "I Mudd", to pure schlock like "Spock's Brain", "For the World is Hollow, and I Have Touched the Sky", and "And the Children Shall Lead" is going to attract a variety of fans for a variety of reasons.
Does "The Squire of Gothos" feel more like "Star Trek" than "The Doomsday Machine"? How does one know?
What about "The Gamesters of Triskelion" compared to "Shore Leave"?
What about TMP compared to TVH?
Where the hell is the TOS archetype so many seem to use as the measure of something's "Trekness?" (Ususally to say why something isn't Trek.)
I feel like people saying "it's not Star Trek" have an idealised version, instead of an actual version that the rest of us watched.