Absolutely, like no question. Once the show's been automatically downloaded you can do whatever you want with it, and setting up Plex is a one-time-only thing. What happens when the content you're after gets sold to someone else or subsumed into another provider and you've got to jump to a new streaming service with different terms and conditions and content restrictions?
I've dealt with a private tracker before and I know you are lying. Spending money on netflix and amazon is simple and costs less and requires less effort than buying everything involved in setting up a plex server.
Piracy is only simple if you are content with watching cheap rips that you download from the pirate bay on your laptop.
Piracy is simple.