I think you completely misunderstand me. I don’t have any opinion on GPL, but in the links you shared, even OSI considers the license to be separate from the definition of open source “Open source licenses are licenses that comply with the Open Source Definition”. You can use a license that open source projects use (ie MIT), and still keep the source closed, or you can write one that puts obligations on you if you want. In fact, you can use or write pretty much any license you want if you own the copyright.