By continuing down this path with Fisher, the chances of reaching success are incredibly slim. In football terms, what is the difference between 7-9 and 1-15? Draft pick order? Because it makes no difference in the trophy case. Same vacant shelf. What we do see: Consistently leading the league in penalties and consistently being the one of the worst, if not worst, offenses in the league are a distinct pattern of failure.
And I do agree with your take: I see Goff as the final 'hope' for Fisher to demonstrate a better football acumen. If he fails with another #1 chosen QB, something most coaches would KILL for, there won't be any excuses left for him.