No really, think about it! In Raiders of the Lost Ark, the Ark is on a seek and destroy mission.
The Nazis are too incompetent to find it, so the Ark drafts in Indy to locate it then hand off to them. Indy gets… clingy and gets in the way – what? – twice. At last, the Ark has the Nazis where it wants them and pulls a St Valentine’s Day Massacre, before finally slipping away into hiding in a warehouse.
Otherwise the climax in which Indy’s role is basically “Don’t look or we’ll lose all our Sanity Points” makes no structural sense whatsoever.