Wouldn’t that make good-commenting on a wide variety of legitimate but controversial matters rather perilous for the commenter?
There’s plenty of daylight between people who might prefer to weigh in on fun stuff like mental illness without a real name policy and people who treat comments as an attrition exercise to be won with robotic assistance and unlimited sockpuppets.
If your use case is narrowed to ‘what people with respectable jobs would talk about at the office when HR might be watching’, sure, enforcing identification won’t have any real downsides and will improve the SNR; but that’s a bit of a narrow use case.