-- I'll put aside he JP issue I was talking about to answer that specific quote. --
Well, if your opinion "you have to play as a job you want a piece of gear for" is solely targeted to make people acquire experience and be better at playing said job, then that too must apply to the current token systems we have in FFXIV. Ie, people shouldn't be able to get tokens (8-raids, tomestones, enhancement materials...) if they plan to get a piece of gear for a different job than the one they played as when getting said tokens (or they should get job-related tokens to buy job-related gear, whatever). If they could, like it is right now, that would be against what you said.
So, if your opinion does apply to token systems too, then great, I can respect it. I can't agree with it as I find the restrictions it puts on the "fun factor" of playing the game too harsh though, but I respect it anyway.
If it doesn't, then you bring a contradiction/double standard to the table where you put an arbitrary line between gear which can be acquired freely, and gear that can't.
Like, there's no objective reason why someone would say "in 24-raids, people should be forced to play as the job they want gear to. But in roulettes/PvP/Eureka/8-raids normal/etc. it's fine to play whatever and buy anything with their tokens". Why 24-raids? Can't they get experience and be better at playing their job in other type of content? You get the idea.
I mean, I get where this is coming from. What you said was to make people perform better, which is something quite positive. Some others find value in these systems as they offer some kind of "reward" and play on the subject of merit. But it's also something dangerous to ask for, as it could lead to restrictions they don't really wanted in the first place. For example, almost every time we get job specific gear instead of gear shared by role, there are complaints. However, a strict "play as the job you want gear for" is right up that idea.
So, do we want all gear to be job specific and that I could only be acquired by playing the job in question regardless of the content? That'd change FFXIV quite a lot, and I'm pretty sure that's not what people actually want. But that's how some posts in that thread are worded.
In short, people should be careful in what they are asking. Or, actually, how they are asking it.
... Or maybe it's just me, and I don't understand why 24-raids are so special that they must be treated as an exception.