Ya this is one information I think a lot of people seem to not notice or ignore. Amaurot was not a species but a Civilization that was the most dominant during the time of the Original World before the Sundering.
We have only seen the view point of people who have lived within the walls of Amaurot and in their view it was a Utopia that made everyone equal by taking away everything that made everyone not equal and leaving major decisions to the Convocation of Fourteen. Certain dialogues have suggested there are people and other civilizations who did not take part in the traditions of Amaurot thus are ridiculed for being different and are much smaller in influence. To the eyes of those who live in Amaurot's society, they are seen as lesser beings.
Not to mention not everyone who lived outside of Amaurot could get in. They had to follow strict rules and procedures before they were allowed to live within the city walls. There is also how Azem had to constantly explore the world and face threats directly with the help of the local population and allies he/she made during his/her time which also suggest the places outside of Amaurot were still quite dangerous and people had to fight for their life sometimes against dangers. The Ascians did not lie as those who lived in Amaurot were living their own ideal Utopia free from the dangers from outside the city and inequality of other people's ideals but they also saw people who lived outside of Amaurot as lesser beings just for being different and not following Amaurot's traditions. Something that made Azem disliked by majority of the Convocation except for Emet-Selch who liked Azem's ability to some how bond with others despite what his/her personality maybe, which lead to their eventual friendship, and for willingly helping people, no matter his/her reasons, instead of waiting around for something to be "approved" on paper.