Some people want to just abolish IP (e.g. patents and copyright) because they've read some articles about abuse by patent trolls or copyright terms that are too long. They're not thinking about (say) the author who spent a large amount of effort writing a successful book, just to have to continue working a regular job, while all the profits go into the pocket of some corporation(s) that are under no obligation to pay the author because copyright doesn't exist so they have no special rights. Or the books that never exist because the author never writes a second book, because it's too difficult and stressful to juggle writing with a job, and they can't live off the proceeds of their previous work.

Legal rights give power to the little guys. Take away those rights, and it'll mainly be the big guys who benefit.