Totally off topic. I am not an UI/UX designer but why can't the page scale to the size of the screen? Sure I could ctrl/cmd++ but is it hard to detect the scre

Totally off topic. I am not an UI/UX designer but why can't the page scale to the size of the screen? Sure I could ctrl/cmd++ but is it hard to detect the screen size? Genuine question, not trying to be condescending.