The production of most Mog store items is authorised taking into account the cost of production vs the returns on the mog store. If it wasn't on the mog store it likely wouldn't be in game anyway because they wouldn't have authorised additional resources for its production. This is why we haven't gotten a Krile coat yet. They were uncertain that the returns from sales would justify the development costs.

The Mog station has been with us for several years now and hasn't crossed the line into selling things it shouldn't. If it did we should most definitely kick up a stink. However people have been raising these concerns and saying 'how long until' since it opened and they have shown no sign of changing.

Let me reiterate. You most likely wouldn't get these things in game anyway if they weren't on the mogstation because they are developed outside the budget your sub pays for. All removing the Mogstation would do would be to remove those items completely from being developed. The only exception is the seasonal event gear and some arguments could be made on that front (though technically if you weren't subbed at the time of the event when they were free you sub wasn't paying for them either) but that isn't what people are currently up in arms over.