A) Punish legitimate users.
B) Push pirates to an alternative source.
C) Waste money which could otherwise be spent on actually fixing the problem.
It's amazing that people miss the "actual problem" altogether.
None of you have a "human right" to get what you want. I might paint a masterpiece and hang it in my bedroom. I might choose to have two viewing days a year where people can pay me to see it (just imagine I can actually paint for a second).
For 363 days of the year, the painting hangs in my bedroom. It's visible from my bedroom window, which in turn is visible from my neighbours kitchen. It is my express wish - as the content creator - that people only view my painting on my terms (two days a year, by paying me).
However my neighbour offers an on demand service to view my painting from his kitchen using his binoculars. He's also set up a camera with a zoom lens and is selling prints of my painting against my wishes.
His operation isn't causing me substantial loss because I'm just not providing a viewing service. Yet what he is doing has no justification, and is wrong.
My wishes, as the content creator, are the wishes that must take precedence. I don't care how many people are knocking on my neighbours door to see it and buy prints. Or how much money I'd make if I did year-round viewings and HD prints.
They do NOT have the right to take something even if there is NO OTHER WAY to obtain it.
And this is the rub.
We do not have the right to consume content just because we want it.
If you do not want to buy something - or use a LEGAL service even if it doesn't meet your requirements fully - you do NOT get to consume it, unless you are utterly selfish and just want your own way.