I'm afraid I have to let you into the secret that telling you that you have problems understanding something (which you do), is not an insult. As much as you'd like to pass it as such to play victim.And how you pick out particular structures of words and fixate on them is petty. Stop trying to make an argument on syntax and grammar whilst insulting people on those choices.
Choice of words is very important in discussion, and the fact that you called it "minor" was evidently purposeful in trying to downplay its effect. And telling.
According to your logic, since it's impossible to completely remove RMT, Square Enix and other MMORPG developer should stop fighting RMT altogether, since "It doesn't matter".
Yet, you're completely wrong.
RMT firms are companies. No less, no more. They have employees, thrive on profit and, besides the fact that often engage in illegal activities like identity and credential theft and credit card fraud, they work exactly like any other company.
Cutting their profits means that, if they want to continue being profitable (thing that is indispensible to survive), they need lower their expenses. In order to lower their expenses they need to cut their budget in the game in which their profits are being cut. Since their only relevant expense is paying their employees, they need to cut the number of employees working in that particular game.
Less workforce working on FFXIV -> Less gil generated and injected into the market -> Less inflation.
It's an ironclad equation. So yes, it does matter, a lot.
Mind you, some could easily just decide that it's not worth it to use their employees on FFXIV, as they can simply move them to another game where they have no official competition, and where their profits aren't hampered, effectively removing a few RMT players from the market. There's very little reason to keep people working on a difficult market when you could just use them into an easy one.