Again, this is unrelated to async/await. Normal functions might return a number or an object or undefined or whatever. Since JavaScript is a dynamic language it

Again, this is unrelated to async/await. Normal functions might return a number or an object or undefined or whatever. Since JavaScript is a dynamic language it is unsafe to call a function without either 1) Trusting that the function returns what its API says it should return or 2) Checking the return type and acting appropriately. So, the grandparent's complaint is about JavaScript being a dynamic language, async/await doesn't fix this issue or make it any worse.