Basically software liability is just rolled up into the relevant market. Writing facebook games? It doesn't really matter to society if you get it a bit wrong. Writing pacemaker software? Then you're governed by medical device regulations.
Software's application to problems are so varied, so wide, that it's insensible to apply a single liability scheme to it.
The wide range of software that can be written precludes a standard measure of risk and liability, hence it eliminates the need for an (software) industry wide accreditation body.
Plus I've always found smaller more local meetups to be a better way of interacting with a specific development community.