It is though. I can basically collect vuln stacks as a tank in any normal mode content without any hindrance whatsoever to the healers because the bosses simply don't deal enough damage. Just the other day, I had eight and stood in multiple AoEs during the last boss of Aetherfont. I only took 100k, which isn't enough to proc Holmgang. Now yes, I did that with full BiS but even with i660, I shouldn't be able to cheese max level content to such an absurd degree when it's relevant. I couldn't collect anywhere near that amount in Extremes.
Basically, you more or less have to go out of your way to die in a good chunk of normal mode content because everything is scaled so low, it's practically impossible to kill you. Just look at the current 24 man series. Europhsyne is such a joke, you don't even get LB3 for Menphina. She just explodes.
And the game doesn't teach you how to play your job. It never has. You don't even unlock White Mage's core mechanic until level 52. Which turns out to be mostly useless anyone since you'll rarely need what is essentially instant cast Cure II. How about Samurai and the whole looping system? A big reason for the simplification we've seen starting from Shadowbringers and being double downed on for Endwalker is because people didn't know how to play their jobs. That, or they just weren't willing to learn. Yoshida even outright stated maintenance buffs like Heavy Thrust and String Shot were removed entirely due to casual players forgetting to maintain them. Which is more than a little ironic when the new Melee releases (Reaper) with a maintenance buff almost identical to Heavy Thrust.
That all said, I think Zepla trying to define demographics was never a good idea. They're all too subjective.