If you wouldn't have otherwise purchased the content there is no loss.
Concerning 2): many people I know who pirate, say, a particular show, would simply not watch if piracy was not available. On the other hand, once this show becomes easily available and accessible on something like Netflix, these same people happily pay for the content. It seems inaccurate and dishonest to call them 'thieves' by the conventional definition.
tl;dr: I wouldn't defend piracy in most cases (you could just not watch the show), but I think calling someone doing this a 'thief' is a morally worse because of what that words means to most of us.