[Serious] Generally speaking, is philosophy a worthwhile subject of study?

[brewer]

A contemporary example like spinozas - Donald Crosby.  
https://en.wikipedia.org/wiki/Donald_A._Crosby

His question is whether a religious worldview can be premised on the discoveries of modern science.  He's of the strong opinion that they can.  He suggests and persuasively argues that they have always been premised on the things we're really only quantifying now.  Maybe he's right, maybe he's wrong - but here we have a philospoher..a theologian and metaphysicist even....doing exactly what we suggest philosopher should be doing, yes?

Yeah, but I/we don't have to necessarily like it or give it more credit than is due.