I don't think piracy needs to be justified because different people have different reasons.
Sure you could argue that you're not actually stealing but creating/downloading a copy of something it already exist. I always found that anti piracy commercial "you wouldn't steal a car" ridiculous as that's not how piracy works.
For example, I do it because I don't agree with how segmented the video streaming industry has become in recent years with this many different services that force you to buy a bunch of subscriptions while continuosly pulling content. Unlike the music streaming industry where all the most popular content (the majority of it) can be found on pretty much every serivce. You could have Spotify or Apple Music, not much difference (if any at all) in content or quality.
When I was a teenager I did it because I couldn't afford to buy any sort of media content and options were limited. Pretty much everyone that owned an MP3 player was pirating music.