Sorry the whole argument of ‘I studied UX, it’s a science’ is just downright damaging at the end of the day. I’ll admit a qualification is helpful, but it’s not the be all and end all.
The mark of good UX/UI is ultimately the customer’s feedback and experience. You can spend days or weeks or years designing something based off the science, but if end users have more pain points then the platform you started with you’ve wasted your time. UX works best as an iterative process between customer and designer- not one where the UX team goes ‘we know the science’ and rubbishes any use cases the customer brings forward.
If you look at any major UX failure (e.g. multiple versions of Windows) the common theme is that they were designed with the idea that the team knew what they’re doing- with barely any end user feedback.
A major UX/UI failure Revolut has at the moment is that they’ve removed any swipes from the home page and moved all the actions to buttons in the top third of the screen- from a common sense standpoint that’s usless with the growing trend of bigger and bigger smartphones. They should be taking a leaf out of Samsung’s OneUI 2.0 and moving action buttons on to the bottom half of the screen- customers want ease they don’t want to have to be two handing their phones to see their balance!