I'm sure that lots of people are wishing that it was cheaper and easier to get whitebait but it really is necessary to control the fishing industry when it comes to whitebait.
If we allowed fisherman to fish indiscriminately and harvest as much as the market demanded we would be out of white bait in a matter of years. And it would do terrible things to the mature herring population. Just because something is in demand doesn't mean that it should be sold. We have to think about the consequences for the environment before we think about the consequences for our appetite.