Tell me where it is justified.
Intellectual property is bit of a misnomer. It implies that you can own ideas, which is not the case. You can have the government harass people for copying your writing, manufacturing something you have paid the government to suppress, or drawing certain pictures.
It’s a really convenient misnomer. I’d be happier if people called it intellectual protectionism or anti-competitive bullshit.
I guess some people would say that it helps folks who are starting out as writers/engineers, but I don’t think it does. It helps people who have a lot of good lawyers more than it helps anyone else. For anyone who is interested, just look up patent trolling to learn more about that.
Most people will bring up the expensive cost of designing drugs, but most of that cost is extorted by the government at the behest of lobbies for big pharma.