On a serious note, it's the emulation of a PnP RPG and of course, they all fail.
Still, while most of the devs fail miserably, some get something nice or even great out of their attempt.
A real RPG needs the creation of the character(s) you're going to play, that's the main feature, you chose who you're going to be and it'll define how this character is going to interact with the world he evolves in.
It doesn't need a lot of numbers but at the very least some characters traits and attributes (doesn't have to be numbers though), eventually skills as well.
Most RPG will feature combat but eventually, you could have a RPG where you can't fight and have to avoid eventual foes, trap them or whatever you can come up with.
Dealing with whatever the game throws at you should offer as many options as possible.
Looking at it this way might suggest blobbers aren't RPG, well, they represent some parts of a PnP RPG, exploration, combat, character development and for most of them fewer quest resolutions and options overall, still, in the history of trying to reproduce the PNP experience, they've got the front seat due to talented devs having nothing in mind but excellence, which is not the case anymore for "big" productions.