FFXIV is too simplistic and bland

[Iscah]

The difference in you changing your default character to some level 50 alt is you have reached endgame.

If they changed their displayed character, I'm not sure that you can actually track down who their other character at endgame is, unless they tell you. Which would defeat the purpose of posting as an alt.

Currently I have eight characters registered to my account. If you go to the Characters tab of my profile, you can only see the four that I have manually linked. As far as I'm aware, there's no way of identifying who the others are either from my profile or via Lodestone.

Even if you could do that, there's no way of confirming that they don't have a second account entirely. Absence of evidence is not evidence of absence, and all that.

This is not to defend his views, but simply to point out that there wouldn't be a visible difference between someone who has reached endgame and someone who hasn't if they choose to conceal it.