Think it this way, we have access to all the English books in the world but are we English professors? all the medicine books but are we doctors? all the math formula but are we mathematicians? the same way, we cannot interpret the Quran and Sunnah the way it has to be, there are many things involved, very complex this is why, we have to follow the scholars and respect them (unfortunately, we have lost all respect for them)
in regard to Milads, I invite you to read the following articles:
Fatwa Regarding Milad
Further Question about Milad