I have been burnt by home inspectors both on the selling and buying end of it. I am not knocking the industry. I KNOW their are good ones out there and there is generally going to be value in having an inspection done.
My personal experience with them is the buyer mainly uses an inspection as a way to lower their offer. If you are reasonably savvy, you know the weak points of what you are buying and what needs to be updated. An inspection puts it all in black and white and makes it 'official'.
I did my own "inspection" on our past and present homes and it was the only way my offers were accepted instantly, because they had multiple offers, pending an inspection.
I know the signs of a wet basement and ways people try to mask it. Plumbing issues, electrical service, wiring, roofing, poor grading, etc..