Because "modern" designers are often degenerates who have zero fucking clues about ergonomics. Their ideal design is an empty screen with a single light gray element on white background.
No, they are not. They are just wrong people hired for the jobs by ignorant management which has no idea how diverse can be design tasks. It’s like blaming React developers working on some Jira tickets without a full picture, which is not a website but a satellite RTOS. An experienced generalist would understand the challenge and may refuse to do it if they don’t have the knowledge, but most people would simply incorrectly assume that they can do it. Management on the other side should have done better.
What I've described is bad in either case, be it Tesla, Web Page or desktop app.