If I'm doing everything right, using my skills, acquiring decent equipment, grouping carefully and communicating well with my group members, I should be able to perform my role ADMIRABLY, consistently, reliably. No failures. I have no idea why anyone would want to see a system where some percentage of the time, even playing the game perfectly, you would still expect to fail due to some artificial dice roll, and disappoint your fellow players all for the sake of some weird twisted version of virtual realism. Holding aggro, and doing it well, is neither silly nor boring in its current form.
So you're saying that we should get rid of damage ranges. Every swing should hit 100% of the time, for full damage. Spells could not be interupted, they could not be resisted. In fact rather than having long boring fights the computer could just calculate the winner beforehand based on the absolute comparison of numerical stats. Sorry, not buying it. There has to be randomness in the game or it would not be a game at all. If you want a game where random numbers have no impact on how well you do you may wish to switch genres. There are not many RPG games built around true real time combat systems, especially not with persistant worlds.