A lot of spectacular point missing going on here
TPB did not and does not host any infringing works - it's a search service, similar to a map.
Compare the Internet with a city that has many regions and slums. You can go to this city and find many things - some wholesome, some distinctly unsavoury.
Somebody might make a map of this city and its slums to help you find what you are looking for - and maybe avoid the less savoury parts thereof.
If you don't like something you find in any city, asking the map makers to remove it is foolish - they do not have that power!
TPB did the same thing. They created a map of the slums of the Internet. They didn't create those slums - they just made it slightly easier to find things within them.