I agree. There are outlandish things that are forbidden. For example, the DMCA means my ripping of my own personal DVD and Blu Ray discs to HDD is not lawful, which is absurd. Sure string me up for sharing the result of that effort or selling the original while keeping my copy, but that transfer from media to disk itself should absolutely be legal.
However in the case of popcorn time, I don't really see the violation being some silly thing (though claims of how much 'harm' is done in judicial terms can be absurd, jailtime and/or unrealisticly high amounts of damage).
I can also go on an offtopic rant about how the copyright holders are unwilling to provide me a quality experience. I just want to buy a DRM-free mkv or mp4 of their media with high quality and then use some very good software to curate the content (like Emby for example). Popcorn time I've never used, but the principle of the thing doesn't appeal either, I want to actually have my library at hand at any given time.