Well the thing is, i almost never get sparking on the things i craft, regardless of going for quality or doing a standard.
Unstables are a different matter tho.

If i botch something which i should have an extremely high chance of succesfully making, the sparking doesnt happen suddenly somewhere in my crafting.
It happens after i blow up several standard or bolds (usually at the very start).
Seems more like sparking is a result of ignoring your high risk, and getting a penalty because of it.

An the opposite end with the same item in the same batch, ive had crafts where i got much lower dura loss even on fails, resulting in a high ending dura without even trying.

From what i can tell risk kind of effects the odds of getting a success instead of a crit success, or a crit fail instead of a fail.

In hundreds of crafts i dont think ive even once seen a noticable increase in the rates of those during crafting,
baring unstable elements and sparking.