The argument makes sense, however for some things a mouse is simply faster than anything else, including a keyboard - and more compatible. For example, I browse the web mainly via the keyboard thanks to Vim bindings, however often it's simply faster to just click a link than doing it by hitting 3 keys. Not to mention many websites build their UI using some JS frameworks which somehow prevent the browser from recognizing any UI elements. This is especially frequent in cookie notifications and newsletter popups that usually can't be clicked away without the mouse.<p>And while I prefer the keyboard for most interactions, most users would probably find the mouse more convenient because the mouse is almost always easy to use without memorising any shortcuts. Every website and program is fully accessible with the mouse, but the same can definitely not be said about the keyboard nowadays.