One could easily take that passage to have said nothing at all about good philosophy. Surely no one here would be defending "hollow and deceptive" philosophy?

They are operating under the assumption that you don't need to check the context of the verse. God said it, that settles it. Contextual criticism is of the devil; it assumes that the world is not full of simple objective moral truths. So turnabout is fair play.

I have to say I've never met a christian who would agree with that; they think they are using things in context, even if they aren't. Turnabout may be fair play, but it's not going to win you an argument with them, if that's your goal...