What is the goal of all these DMCA takedowns?

I think we know at this point that piracy is a hydra. You cut off one head 2, more come, yadayada. Why do they do this? Are they actually as deluded to think that they will be able to end piracy (using piracy as a catch all btw, I don't think emulating the hardware of a game console that's not even being sold anymore to be such) as a whole? Or is there another reason entirely?

I know that entertainment lobbying groups have been pressuring congress into forcing ISPs to block their sites, but I feel like there are more than a few ways around that. Are they ignorant, or are there alternative motives at hand?