Isn't "...once you've learned this simple notation, equations written using them are easier to manipulate than equations written using functional notation..." h

Isn't "...once you've learned this simple notation, equations written using them are easier to manipulate than equations written using functional notation..." his argument why operators are more clear? I don't necessarily agree with that, but I haven't made a world class programming language, either. I just assume he knows something I don't.