Re: Theft is taking with the intention of depriving the owner of the thing stolen
Copyright may be anachronistic to you, but it's an essential part of their income security to millions of artists, writers, designers, musicians and other creatives around the world.
And TBH I don't remember music ever being terribly expensive back in the days of physical media when you could always buy a bunch of CDs for £10 or £20 in HMV etc. These days the physical cost of music is virtually zero with ad-supported versions of Spotify et al. Streaming video services are hardly extortionate vs the glory days of pay-TV in the 2000s. AAA games are about the only mass media format that can maintain a premium pricetag in 2020.
And of course there are caveats: algorithms favour the biggest artists, musicians are paid peanuts for the streams, etc - but on behalf of creatives everywhere, I call bullshit on your argument.