Computer Science is an academic subject, and famously the Computer Scientist Djikstra didn't have a personal computer for a very long time, so you're right that you don't need CS for web apps.
You also don't need to be a surgeon to put in a few stitches (though you will have very nice stitches if you are one).
In other words, if all you can do after a Computer Science course is web apps, ask for you money back. As you alluded to, simple web apps have never been easier, but there are lots of highly interesting and difficult coding problems outside of that niche (think search engines, aircraft software, operating systems and the list goes on).
You also don't need to be a surgeon to put in a few stitches (though you will have very nice stitches if you are one).
In other words, if all you can do after a Computer Science course is web apps, ask for you money back. As you alluded to, simple web apps have never been easier, but there are lots of highly interesting and difficult coding problems outside of that niche (think search engines, aircraft software, operating systems and the list goes on).