It’s the same reason all UX Design went super flat. Flat geometric shapes and text are easier to display at various widths and size’s across a lot of different types of devices. Doing anything more complicated than colored in wireframes is too expensive to produce especially when time to market is important.
As a UX designer I hate this but that’s the reality of why every site has the same boring flat design.
Text is also going out of fashion because supporting multiple languages is expensive compared to just a single set of hieroglyphs for everyone everywhere in the world.
As a UX designer I hate this but that’s the reality of why every site has the same boring flat design.