The aforementioned post suggested that with the existence of such fines, people may actually hesitate to call 911 in the event that they believed someone was having a heart attack, so yes... you did imply it.
Except of course it isn't feasible... as evidenced by the fact that nobody would ever get fined for calling 911 when the caller sincerely believed that someone was having a heart attack, even if they were mistaken in that belief.
But abuses of 911 still happen... and their chief problem is that they can and sometimes do interfere with their ability to deal with actual emergencies. The fines exist to hold people accountable for such abuse, but with a NIS phone, there is nobody to really hold accountable. Of course, there was nobody to really hold accountable for 911 abuse calls made from pay phones either... which also had no fee to call 911. I would imagine with NIS cell phones, however... it as an issue of scale.
I do not advocate disallowing NIS cell phones from calling 911, however, unless they can show that the 30% of actual emergency calls made from NIS phones, however low that might be considered, would have feasibly been reported just as quickly if NIS phones were not allowed to call 911.