I agree with you because slavery also denotes a time frame (forever). You could steal someone's novel that they spent a year or more writing. that would be theft, not slavery.
I do believe this is very much the case. If you ask questions you can often expose flaws in their logic and/or help them structure their logic in a way which helps them see a different view of the topic.
While the Netherlands is a nice place to visit and you can freely smoke cannibas in local "pot shops", I don't think I will be heading over any time soon.