They're not ignoring the use case. As the article notes, the new API will work fine with blockers like Adblock Plus.
It is the same company that bought the uBlock clone, including the domain name, so they can mislead people and give them the illusion of adblocking.
Hill wanted to stop working on it, handed it off, and then it got bought by evil Germans. Then, he released and maintained an unfucked/original version: µblock origin