Ask HN: Why “Sort By” button on YouTube is so silly?

I'm talking about the line which has "NNN Comments" indicator trailed by "Sort By" button. The line is almost empty and all it has is two buttons. The "Sort By" button calls the widget which is a bit annoying. The widget I'm talking about has two buttons which is appearing after clicking the "Sort By". But why Youtube did the widget if he can just give us the two buttons in the same line with number of comments? I recommend you to open any Youtube video in desktop browser to see what I mean. I love to toggle between "top comments" and "newest first" so this widget bothers me because this is one extra click and one extra aiming (widget can appear upwards or downwards depends of state of scrolling the page inside of the window). Any versions about why the widget exists? Maybe it can give Youtube few extra cents per visitor or am I miss something?