The Shadow
Hero
The word 'just' is doing a lot of work in that sentence.I'm not entirely sure the difference between a task resolution and conflict resolution actually exist, to be honest: it's just a matter of scope.

Okay, first a quibble: In the system you describe, actions don't have the same chance of success. Every third action has 100% chance, others have a 0% chance.Yes, literally anything you can think of, regardless of how reasonable, awesome or silly it is, has the exact same chance of success at a given moment.
- There's a player who controls a single character, and at any moment they can declare that their character does something ("I hit him with my sword!", "I kiss her!", "I flap my arms like a bird and fly!")
- There's a GM who resolves each of these actions as follows: every third action succeeds and the character ends up in a better position, all others create more problems than they solve.
Also, I gotta say, I would find that system extremely unsatisfying. People would be gaming it left and right, coming up with factitious actions to fail, so that they could succeed in the stuff they considered important. In fact, I'm not sure just what playstyle would enjoy that system, except apparently yours?
Okay, I see what you're saying. But people who are bad at fighting sometimes have to fight regardless - and there's drama in that, surely. I guess what they should do is narrate at best middling successes with their fighting?Yes, your character being, say, good at fighting and bad at math doesn't influence whether they'll succeed or fail at all.
Yes, nothing is stopping your character from solving a mathematical equation of the Universe, ascending to the godhood and reshaping reality to their liking.
But if you have created a character who is good at fighting and bad at math, why would you do that instead of expressing a character you have created by acting consistently with the character concept?
It's definitely putting a lot of onus on the player here - not that that's necessarily a bad thing.