It goes along with how they've stopped calling it a user interface and started calling it a user experience. Interface implies the computer is a tool that you use to do things, while experience implies that the things you can do are ready made according to, basically, usage scripts that were mapped out by designers and programmers.
No sane person would talk about a user's experience with a socket wrench, and that's how you know socket wrenches are still useful.
UI and UX are different, but related, things though. Anyone who conflates the two either doesn't know what they're talking about, or is at least being very unclear and mixing up words along the same lines as calling a PC tower the CPU.
Oof, you’re talking to the wrong guy. I’m literally a user experience designer. Not even joking.
User interface just means the styling of the website. The colors, button styles, typography, line-spacing, imagery, etc. These guys usually build out pattern libraries or design systems for the UX guys and developers to work with.
User experience design is much more broad, hard to give a general definition. Basically try design “architect” I suppose, that creates blueprints based on data extrapolated through analytics and research.
Sometimes they go as far as to build out prototypes and deliverables for developers using the pattern library created by the UI designers.