I've had more than a few readers tell me they find it hard to post comments. Basically, you've had to sign up for an account; and not everyone wants to do that.
The problem is spam comments, which I'm guessing are generated by computer programs.
Just now, I clicked one of the options; it allows anyone with a Google account. A Google account is free; I've had one for years. I am pretty sure nothing bad will happen to you.
Let's see how that works.