Why would a developer be in charge of testing the user experience from the user perspective? Either have good relations with your end users or use QA with prope

Why would a developer be in charge of testing the user experience from the user perspective? Either have good relations with your end users or use QA with properly outfit machines. It doesn’t have to be either/or, it can be both. Developers absolutely should be using their own software frequently, seeing and feeling how well it performs; trying it out on a lower-spec machine is always a useful exercise. That doesn’t mean you can’t also have dedicated QA. Developers shouldn’t have to be in charge of QA, but they should have some involvement.