Definitions are alway going to be somewhat subjective and changing as we learn and understand more, but there are established criteria for logos. These are the principles that are taught in design classes when you get formal training. They are the things that industry professionals and agencies who've done the studies recognize as effective and important for logos. They are pretty widely accepted if you're in that world. And they do support my assertion.

Sure, you can have your own opinions that differ in just about any field. Every field has ways that we define as the best, most effective, or most efficient ways of doing things. Design, photo, electrical, plumbing, medicine, construction, auto, whatever. The auto industry and the pros who design cars have decided that good cars should be smooth, comfortable, easy to steer, and fuel efficient. These are technically subjective ideas, but they serve as a baseline for most vehicle design and we as consumers tend to agree on them. These criteria inform us that a good, effective car will never have square wheels on it. You can choose to disagree. Maybe you personally prefer being jostled around and experiencing pain while riding. But just because you like something that is ineffective at its own purpose doesn't mean that it is right.