Agency Website question

I am posing the following question after looking at what seems like hundreds of ad agency websites in the last few days…

1.  Why do all of them feel so compelled to tell me the intricacies of their philosophy but in the end really say nothing at all?

and

2.  Why do they all seem to have a section of their site titled ‘what we do’?  Seems a bit amateur to me and downright stupid.

Just some thoughts.