I often use my browser with JS default and it boggles my mind how developers use JS for things that could be perfectly done with HTML and CSS. For most websites

I often use my browser with JS default and it boggles my mind how developers use JS for things that could be perfectly done with HTML and CSS. For most websites used as websites (reading the content), not apps, JS is completely reduntant. Moreover, it looks like most JS code is used for all possible trackers and ads. JS is great (or: decent enough), but for apps, not for HTML documents.