Fusion isn't a good example. Self driving cars are a battle between regulation and 9's of reliability, if we were willing to accept self driving cars that crashed as much as humans it'd be here already.

Whatever models suck at, we can pour money into making them do better. It's very cut and dry. The squirrely bit is how that contributes to "general intelligence" and whether the models are progressing towards overall autonomy due to our changes. That mostly matters for the AGI mouthbreathers though, people doing actual work just care that the models have improved.