Some of philosophy is like what you say but the materialists specifically state what is what and what should be usually their philosophy is based on no evidence.

Very right!
In this respect I'd like to regard for example most theology to be such a type of philosophy.
Since 'Philosophy' is not a protected trade mark, everyone can subsume his/her/its thoughts under philosophy's name. (What theologians never would do, but many scientists and followers of scientism.) These all claim to act on truth. They differ 'only' in the methods and in the presumptions. This is crucial.