I agree with you. I don't think this is a particularly useful spending of their time and resources since there's a plethora of reasons not to consume dairy. However, you did bring up their kill shelters which I responded to.

Again, I am not defending them using their don't-consume-dairy-to-prevent-autism shtick. I don't agree with their outright villainisation in regards to everything else they do, which is definitely heaps more than the average non-vegan does in terms of pro-animal advocacy.