The problem with philosophy is that science has crowded out most of the good stuff. Who cares about a philosophy of chemical reactions when we have chemistry? Philosophy is useful around issues which don’t admit to empirical study, or for which study yields inconclusive results. In the words of Feynman, “Philosophy of science is about as useful to scientists as ornithology is to birds.”
Unfortunately instead of sticking to ethics, morality, and other hazy constructs, too often philosophers think they have something useful to say about everything. The result is a lot of bloviation and self-satisfaction with very little substance.
Hence the “boil it down to a single page” issue.
Edit: My biggest problem with philosophy is that I can imagine a sufficiently advanced civilization which has testable answers to the questions posed by philosophy. I distrust a field of study which proposes to produce something which amounts to a placeholder until scientists do the real, hard work. To go back to my initial example, the philosophy of chemistry became a pointless endeavor with the death of alchemy, and the birth of chemistry.