There are several threads with detailed discussions regarding fudging rolls that you can search for if you want to know the various techniques and their pro's and con's for fudging rolls. Basically, FG can't flawlessly accommodate fudging, not because of technology/capability, but because if you are using the automation, then in order to fudge a roll, you have to interrupt the workflow, and as soon as you do that, the delay becomes obvious to the players.

