The word "ecology" comes from Greek "oîkos" meaning "house" and "-logía" meaning "study". It's about studying the mechanisms and relationships, and figuring out how things work together.
The word "economy" comes from the same "oîkos", and from "nómos" meaning "law" or "custom". It's about making arbitrary unsubstantiated statements about how we wish things should work.
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@deshipu counterpoint: I suggest looking into Freakonomics and their interesting books; apply economics to alternative domains. https://freakonomics.com/
I think your word-derivation conclusion is a bit misleading (and I'm sure you know that).
@sgryphon You can write a hundred books cherry-picking after the fact the pronouncements that turned out to be right by chance, but that doesn't change the sad fact that they still have no predictive power for the future events. And no matter how wide you throw your net, finding economic predictions coming true randomly doesn't change the fact that they are all literal garbage, invented only to justify decisions that were already decided upon in the first place.