Oh, come on. If (classic) Trek doesn't model a utopian society then nothing does.
But these sorts of revisionist sentiments illustrate the "drift" going on with Trek. The further and further we get from the original Trek creators the more the vision of Trek drifts away from anything resembling original intent.
People may not like the religious analogies but the word "canon" is not new and it comes from religion. In the early days of Christianity you had Peter vs. Paul and then after the disciples all died you had sects like the Coptics, etc...
In its own way, that's what's going on with Trek. It's a schism. Some of the worst wars in the world were between rival sects (like Cathoics vs. Protestants).
The same people who throw up gifs of the church of Trek from Futurama to ridicule Trek purists are still in their own way demanding adherence to a canon, aka the revisionist canon. It's totally a double-standard.
The reason why it's generational is that pop culture is intertwined with fashion. Once something goes out of fashion society frowns upon it. Once disco and bell bottoms went out, anyone who still liked it was considered out-of-step with the times. Once grunge arrived, hair metal was "passe" and you'd be laughed at for liking it.
Most of the ardent DSC defenders embrace that approach, of putting down purists as out of touch geezers who should just shuffle off and leave the franchise to the next generation who "know better" how it should be done. This also feeds revisionist history of taking potshots at earlier Trek (aka Trek was never utopian, Gene was a perv, miniskirts are sexist, etc...). If you can't sing the praises of the new stuff, then make the old stuff look that much worse in comparison.