Why do you suppose they chose to publish this hit piece as a blog post instead of going through the peer review process with a real journal article? Or at least a formal letter to PLoS Medicine?
I'm not sure. Maybe they did both and the real article is somethere in peer review pipeline. (Do you imply that no posts on replicationindex should be trusted since they're not properly peer reviewed?)
One possible reason is that blog posts are more widely shared on social media, and I agree that this is kind of a hit piece, mostly as a reaction to Ioannidis' contrarian stance on COVID-19, so publicity was probably an objective here.