I agree with you @wakeupkitty. When I google something, I also mostly come across old Steemit posts. @the-gorilla has already investigated this issue and found the reason. When communities were introduced, the search engine-obscure prefix hive-xxxxx was added to the URL of each post. Therefore, if you want your article to be found through a Google search, then it should be published on a personal blog outside of any communities.