That's like saying that walking isn't an alternative to driving because there's no wheels. It's different, has a superset of functionality, and a different interface. It isn't a fork of ABP.
Adblock Plus / Edge has a "Fire and Forget" mode, as I described in my grandparent comment. HTTPSB does not. Hence, HTTPSB's functionality is not a superset of Adblock Plus/Edge's functionality.
Your analogy fails too. I use a manual javascript blocking add-on (noscript) instead of an automatic blacklisting one and its not a deal-breaker. Minor effort required.
