Simply because hot paths are less common for a "typical" workload. So you'd want it to be more ergonomic by default. Where possible, jam all optimizations into

Simply because hot paths are less common for a "typical" workload. So you'd want it to be more ergonomic by default. Where possible, jam all optimizations into the compiler so nobody has to think about it. If you can't do that, then allow developers to give the compiler more information even if it's more complex. Relatedly, it allows the language to help you "first make it work, then make it good".