Not an issue in Europe. Though granted the US would probably need to replace their fire trucks with sanely-sized ones. You also don’t need to haul a big-ass ladder in a low-density area what’s your plan use it to do a header into a suburban pool.
Regarding response time absence of gridlock will be more important than the last hundred metres on a residential street, consider investing in public transportation, walkable cities, and generally everything that abolishes owning and using a car being mandatory.