I know a least a dozen people with PhD's in science, medicine or engineering and only one of them is following the academic path, and he gets regular offers of big bags of money to work for various commercial companies. The only PhD's I know who are 'stuck' in academia are people with PhD's in 'softer' subjects like architecture or social anthropology.
the facts are that they expect you to follow the academia path
Again this varies a lot from advisor to advisor. I know at least one guy (and know of several more) working at a company started by him, a classmate and their advisor during his PhD program. I also know other people who's advisor happily used their contacts in industry to place their students in great jobs.