They probably are for some areas, but where I work (Bay Area - not in a major city), the biggest concern I'm aware of is fire (with is exempt) and earthquakes (which we have no amendments for). SF probably needs some amendment due to it's unique geography and history, sure, but outside of those types of cities (so SF, LA, and the areas immediately surrounding them), I don't know how necessary they are.
I think the far bigger issue is zoning and the power some communities have over projects. I work in a county where the cost of a house is absurd. Like, sell your child and harvest your parent's kidneys absurd. There's a LOT of NIMBY people here. One town has been completely ignoring the Governor's orders for years now, effectively blocking all multi-family developments. Hell, even single-family developments struggle in that town. I'm currently working on a project where we're replacing an exterior door with some NanaWall-type folding door system, and it's being held up because some neighbor doesn't want that alteration to happen (heaven forbid they see and hear construction for a month - not a joke, that's basically their reason).
I'm not usually one to advocate for removing red tape. I think it usually serves a practical purpose and is a result of lessons learned in the past. But some cities take it to an extreme where even I, the red tape, rule-obsessed weirdo, thinks it's a bit much.