I upvoted for discussion, but I actually disagree. Consider Web development as a major counterexample.
Conversely however, I do hear about companies that have taken someone's SaaS app by dumping the front-end code, and building their own backend, and releasing it with absolutely no changes to the elements they've stolen.
This may be due to my filter bubble making it so I hear more about web apps (I write web based apps) but anecdotally it does seem that SaaS is not a protection against piracy.