If you mean it doesn't make sense to speak full sentences in a language to a cat and expect them to understand, then sure, I think the vast majority of people get that. Having a name for your cat goes make sense though - they learn to recognize their name and many will come when you call it. That name doesn't have to be a regular name or word, of course; there just recognizing a particular sound or sequence of sounds. You made up a new sound for your cat - that's no better or worse than calling it "Fluffy."
Cats do recognize other words, and can pick them out. Ours for sure knows "dinner," "hungry," "get down," and "up up." It's easier for us humans to use sentences though (e.g., "Are you hungry, do you want dinner?"). Also, a lot of people have pets for company, and it can feel less lonely to talk to your pet, even if they don't understand.
Interesting fact: apparently cats that aren't raised around humans don't meow much.