See but the issue is that humans are not perfect, and time is usually a resource. Without defer like mechanisms objects get leaked, mutexes held after return,

See but the issue is that humans are not perfect, and time is usually a resource. Without defer like mechanisms objects get leaked, mutexes held after return, etc... In a perfect world everything could be perfectly explicit as infinite time and energy has gone into ensuring nothing is forgotten and everything / every code path is well exercised. Even then, scoped based resource acquisition / releasing still feels more ergonomic to me.