There are even more mercenary groups, whose business model is basically extorting organizations for donations, threatening with expensive lawsuits and bad publicity.
It seems pretty likely to me that NAD's lawsuits are more about this, and less about actually caring about deaf access. There are a lot of them, and they seem to go for big pockets. Probably the efforts Berkeley went to to offer accessibility would have been deemed good enough to not sue over (for now) if they had donated.
It doesn't mean the causes such orgs ostensibly fight for aren't good. It's just that when enforcement is by lawsuit, it's inevitably selective enforcement, and that just creates a huge business opportunity for unscrupulous lawyers (which there is no shortage of).