AKA: The Most Evil Thing You Can Do Is Write Tom Clancy Knockoffs
The X-Files is, on the whole, not overly interested in the people who make up its villainous conspiracy. They exist, they live and they die, but they're not generally explored beyond that. The exception is, of course, the Cigarette Smoking Man, the longest running and most well known member of the conspiracy. The desire to flesh him out, to make him less of a force of nature and more of a person, had to be handled carefully, lest they risk making him less interesting or less of a threat.