Somewhere along the line, Spielberg joined The Leftist, Liberal Hollywood approach to movie-making, whilst still relatively young. This would forever affect his film for the worst, for part of this Leftist/Liberal philosophy was that "Guns Are Icky!" and would never be used to effect in a Spielberg picture, forever on. One of the earliest indications of this trend that I can recall, off of the top of my head, was in JURASSIC PARK: LOST WORLD.
The character Eddie, a Field Tech Expert, is confronted with a pair of T'Rex and although he has a rifle by his side, Spielberg demands it be snagged, and inaccessible. Despite the fact that Peter, Harrimond's nephew, has gone on his expedition with "a couple dozen Marlboro Men," the only one to really use a gun is The Big Game Hunter and because the Earth First Guy screwed with his gun's ammo, all he has to shoot with are tranquillizer darts.
KINGDOM of the CRYSTAL SKULL does have Indy - I mean Henry Jones, Jr. - shot at, in the Warehouse, but you'll notice that though he stands directly in the line of fire of a couple dozen Ruskies, not a stray bullet wings him. And ONLY the bad guys are ever allowed to fire a rifle, in the first place. The only way Henry gets a shot off at his Double Agent pal is by dropping it and the gun accidentally goes off and shoots him in the soul of his shoe.
Even when Henry is standing there in the graveyard with his kid and some crazed natives are giving them a hard time, he does, indeed, have a gun on him, but it is only as an empty threat. Spielberg is so idiotic with his Gun Stance, that I really wish he'd hand these better franchises over to someone else who doesn't share his Hollywood Liberalism. Also, yes, he has gotten old and has lost his edge, anyway, even if his Politics never came into play. His heart just isn't in these type of "Entertainment" Movies, but since his name is bankable and he loves money, he finds himself doing them, anyway.