How conceited is it I truly wonder. Trek has I think presented the evolved humans/Federation members in an incomplete way. The majority of people in this day and age are for women's rights, anti-slavery, pro-democracy, pro-workers' rights, anti-child labor, etc, yet this was not always the case. Did we "evolve" biologically into different beings? No. We evolved our society to better express our preexisting potential.
That does not mean that if we keep at it, the world will become one massive episode of
Leave it to Beaver. (Those characters did not react in a realistic way. O'Brien devolved in DS9's "Hard Time" in a realistic way that Beaver never could have. Beaver wasn't more evolved than O'Brien; Beaver was less true. Picard was not dissimilar BTW; by the end of the torture he suffered in TNG's "Chain of Command, Part II", he
saw *five* lights.)
What it does mean, is that as it would take a lot for us today to change most of
our minds and go back to an anti-democratic, pro-slave, mentality, it would take similarly a lot for 24th century humans to return to worldviews similar to ours today. Why would they disregard centuries of hard-fought history and no doubt countless quantitative scientific analyses telling them they're richer and happier than ever to return them back to today, any more than we would to go back four hundred years to 1615?
...Many people today have ample opportunity to be more dishonest than they are and get away with it, yet aren't. Shoplifting at a convenience store is relatively easy, and though many people do do it, how often have
you considered it? Sure you have occasionally - who hasn't? - but along with the dread of getting caught, what stops many people also is a feeling of loathing for the anarchy of it. They don't think it should be so, so most of the time don't even
think to do it. That is, when they're not hormonal teenagers seeking a little anarchy. Enough of us don't want to have to "take more than our fair share" and the
Kwik-E-Mart stays open.