You're probably familiar with Francis Urquhart's catchphrase from the House of Cards/ To Play the King/ The Final Cut political trilogy.
Unfortunately it has also applied to my blog - most people couldn't possibly comment on it, either, because one of the settings in the Google blogging software wasn't set to allow all readers to chip in with their comments. Sorry about that, but like most bloggers I started with zero knowledge of blogging software and have learned on the hoof.
I've fixed it, and now anyone can post comments (however belatedly) on anything they'd like to react to.
PS If you use the Blogger software, you might want to check people can comment on your blog, too. The place to go is Settings/Posts and Comments/Who can comment?, and make sure 'Anyone' is selected.