Auto-attack

[MariyaShidou]

Every RPG uses it that I have played even the new ones like RIFT..

Not every MMORPG

There are MMORPGs without auto attacks that work, and they happen to be more engaging/require bit more strategy than you claim. Allods Online, DCUO, Dragon Nest, TERA, RaiderZ, WH40KDMO etc. are either doing that, or aiming for that.

And obviously not every RPG uses it. The Elder Scroll for instance, then Gothic, Two Worlds, Mass Effect, Risen etc.