Someone should probably let you know that science is a subset of philosophy (or "philosophism" as you seem to think it's called).
So, I just fundamentally disagree that Philosophy contains everything that has something to do with thinking or believing stuff. It's an oversimplification to the point of being vacuously true.
Not really. To use your analogy a bit, the GGP was basically rejecting human language in favor of English on account of it being so wonderful that English-speakers visited the moon. It's nonsense. If you reject philosophy, you reject science.
It doesn't take that much charity to interpret that what the original poster was saying as, "I reject the subset of philosophy that is not science, on the grounds that the subset which is science has all of the value," a legitimate position at least which is not tautologically false. I guess the reason why one thing being good could make another thing bad would be that time spent using nonscientific philosophical techniques to answer questions incurs an opportunity cost, that you are not using scientific techniques to answer them. Or even that trying to answer questions that scientific techniques can't solve incurs an opportunity cost, that you could be answering other questions that you had a chance at solving. (That would be a consistent belief if you thought that nonscientific thought couldn't make progress on questions, even if you conceded that scientific techniques could not make progress on all questions.)
I think the original post has shown your reinterpretation is probably too charitable: https://news.ycombinator.com/item?id=26345215
It's a pretty classic case of celebrating science without really acknowledging or understanding its foundations and dependencies.
Why is it that we need to constantly go here with accusations of ignorance? Do we really need to do that all the time? Somehow philosophy contains everything, all the time. You're ignorant! No you're ignorant! My thing contains your thing! No, my thing contains your thing!
Read my comment again. Why do some philosophical problems get turned over and over for centuries with no progress and yet the empiricism of Science has absolutely revolutionized human life? Why should we be so afraid of some neuroscientist who hasn't read Searle? I mean, isn't he going to just stumble on it again? If it's true, then they would, right?
Are all philosophical questions resolvable by Science? I think no. But there are so many questions that I feel are poorly informed by a cloistered set of Philosophical priests who speak another language they made up. Frankly, I don't feel bad when they are "galled" that a scientist takes a new look at a problem they've made no progress on.