Why are many languages case sensitive?

Question

Why are many languages case sensitive?

Is it simply a matter of inheritance? C++ is case-sensitive because C is, Java is case-sensitive because C++ is, etc.? Or is t

Answer 1

Because they're as dumb as a box of frogs, for precisely the reasons given for the opposite viewpoint in this thread (I'm not even gonna ask what that's about. Wood for the trees and all that).

When FOOBAR = FooBar = foobar, you get to choose your convention, and other coders can do the same whether they share your preference or not. No confusion.

They also can't get away with the stroke of genius that is having a constant, function and variable all with the same name in the same file, albeit with different caps. Again, no confusion.

You call your variable WebSite, they call theirs Website, and which system gets confused? Not an easy catch either, when you're scanning.

As for lookups, is it really that much more processing to convert the name to lowercase before looking it up? Doing your own premature optimisation is one thing, expecting it from the developer of your language of choice is a whole other level of missing the point.

...and yet, all these answers saying case-sensitivity reduces confusion. Sigh