Human beings only have the capacity for very limited rationality and logic (generally) so all fields are dominated by irrational ideas.

Because of the power of memes to infect their hosts and destroy competing memes, as well as the relative cognitive bandwidth of most humans, this unfortunately can no be remedied.

But you are correct in stating the first AGI will be an ASI instantly or nearly instantly. Double the compute of an AGI and you have an ASI, improve the algorithms slightly and you have an ASI, give it more training time and you have an ASI, increase it's memory and you have an ASI. However, you can not change people's views on this enough for every one one to switch to using the term ASI.

Logic and rationality effect such a minuscule percentage of the population as to be virtually irrelevant, to nearly any discussion involving multiple humans.