I can write numbers like three by just writing 3 in my code. When I want a named number I use a syntax like x = 3. Why should functions be any different? A language doesn't need different ways to name things for each type of thing. Integers, strings, functions etc: they can all use the same mechanism for naming.

I agree if your language is designed like this from the beginning as functional languages are, but in C you already have different syntax for functions. (edit: rephrased)