I am not an accountant, but a cursory look at their financial statements showed less than 20% of expenditures being for administration and fundraising and over 80% to programs. If I am missing something, I would appreciate someone pointing it out, but I don't see where the statement that "WWP only actually gives about 15% of every dollar donated to use for what it should be used for" comes from.
I think they missed a good publicity opportunity, and I find their attitude towards firearms to be hypocritical, but their position is not openly hostile towards 2A issues. Choosing not to promote firearms as not the same as overtly opposing firearm ownership. Firearms ownership has been associated with certain political views, albeit erroneously, and they may well wish to avoid the appearance of endorsing any particular stance in order to remain open and receptive to all who need their services.