Because they use shiny mac computers that all have the same screen. If it looks bad on other screens they just dont care. They are designers , not UI UX special

Because they use shiny mac computers that all have the same screen. If it looks bad on other screens they just dont care. They are designers , not UI UX specialists , nor know anything about readability or ergonomy. They are just trying to follow a trend , a horrible one born from only god knows where ...