The biggest problem with average contemporary "true adults" is that they only act as if they have their shit figured out. In reality they mostly tend to be incredibly close minded, have super limited knowledge of the world due to their TV addiction and are generally more authoritarian due to our socioeconomic system being super authoritarian.
The (more intelligent and cultured) outliers are actually closer to these supposed "kidults". More open minded, more tolerant, way less zealous.