There's also the much more substantive consideration that "public pressure", in the shape of a rally like this one, only works at all if there's a credible threat of meaningful action if the presented demands aren't fulfilled. There being no chance of that here, the upcoming rally is little more than a chance for the soi-disant protesters to get out in the fresh air and reassure themselves that they're Doing Something Meaningful.

I have a hard time imagining anything worthwhile that could come from powerlessness and disengagement.