Yes but the Duty Finder isn't the ONLY problem.

He even specifically addresses this in the same post:

At the game’s start, however, while everyone is still at a low level, the majority of players are concentrated in the three city-states and surrounding areas. This can not only lead to a lack of enemies to slay (preventing quest progression), but also see area servers overloaded, and ultimately lead to crashes.

Fortunately, differences in total individual play time, login times, and character/class progression will eventually lead to players being more spread out within each World. Once this happens, there will be less need for both login and character creation restrictions.
This is why people are complaining about AFK'ers. The Duty Finder alone isn't why there are limitations in place and when you AFK you are still using resources that are preventing someone else from logging in, even if neither of you touch the Duty Finder. The whole "I'm not using the DF so it's okay" argument is a half-truth really.

Now I'm not going to get on your case about it as I did it myself all weekend so I could avoid the login errors, but I will full well admit that I intentionally did it knowing full well I screwed people over by doing it (heck there were people in our own LS that couldn't log in due to people like you and me being logged in but AFK for hours on end) and not trying to justify it with a selectively quoting or paraphrasing dev posts in a way that makes it sound like no big deal.

And of course upgrading the hardware is more important but if the issue persists and they don't see further upgrading hardware as financially viable barring a continued surge of demand following digital sales re-opening, then they will shift those development resources to putting in that autokick-AFK feature because they haven't openly said "we're not doing this."