

Because not everyone has the skills, the know how and the time to learn a new operating system.
Most people if they were to try to install Linux would probably endup breaking their systems somehow, most don’t wanna risk it.
It may seem simple to us, but think of it from the perspective of someone who is afraid to install a program because thinks it’s going to make their computer explode, have no idea what a bootable USB is, and have never used a command line their whole lives.
With modern computers with UEFI and secure boot installing Linux is even harder, no average user is going to mess with any of that.
For the average person, the computer is just a very secondary thing in their lives that doesn’t get any attention besides the average “my phone is full, I need to copy my photos to the computer”. Tech companies know this so they exploit the user’s ignorance.
From my personal ethics standpoint, intellectual property is a form of private property which I’m against, also a form or artificial scarcity, which I’m also against.
If you want to support a small artist? You can maybe donate to them directly? Is that a thing? Maybe they have a patreon or something? In my case I have way less money than the artists I consume from so donating would make no sense.
Also, the act of making a copy doesn’t remove the original, the artist doesn’t get poorer because you pirate their content.