Okay so if I am correct I think you're saying all or most of token should be linked in one way or the other to a Decentralized Finance (Defi)
I mean if a certain project/platform has their own token, then of course it will be somewhat liked to it. DeFi is a category of tokens/projects, it's not a platform. It's like categorizing banking stocks, tech stocks, etc — in crypto DeFi is also a category.