In my opinion by default giving permission may create some problems as in my experience I have seen images posted which are not relevant to forums and even inappropriate in nature.(Not by genuine help seekers)
Hi Sunil, it used to be this way but there was significant spam and self-promotion because of it. We now have moderators in several different time zones to help minimize delays on image approval. Sorry for the inconvenience, but unfortunately this is the way it needs to be.