The depth and breath of Torah discourse over the last few thousand years is like statistics. If you have a preconceived notion, you will certainly find sources to quote that support your opinion. And your detractors will find sources that prove that you're wrong.
Not really, that's why we have a mesorah.
Just like in halachah you can't just pick any posek that lived in the last few thousand years, so to in hashkafah we have a mesorah.
Unfortunately many of us were never given over the mesorah, but that's like someone who never learned halacha on depth, if you have a question you ask a posek, not go to a bookcase and do eeny meeny miny moe. The same is in hashkafa, you ask someone who was mekabel the mesrah.