Even if you think the model is learning in the exact same way a human does, you can't pretend it uses the information in the same way. A human, if it really wanted to, could study your style and imitate your blog posts maybe once a day, with varying levels of quality. An AI can do that a million times a day, perfectly, forever, basically for free. It's simply not a good comparison.
Nobody is concerned with AI learning from their content, they are concerned with how the AI will use their content, and there is no useful comparison between AI usage and human usage.