It's not uBlock Origin they're concerned about, though - it's all the other random extensions out there that could use the same capabilities for evil instead of good.
Ultimately the freedom to decide what code a person runs on their own hardware has to be left up to the user. The users who install every random extension they see are the same ones who download every app and click on every link in the spam they get. You can't protect users from themselves, but you can empower them to better protect themselves.
Downloading a sketchy browser extension takes deliberate action on the part of the user. Just loading CNN.com can (and has) caused computers to become infected automatically because of ads. Limiting the ability to block ads is not protecting anyone.
