To a native, I am sure it seems like a very obvious and stupid gaffe. And, it does show a lack of fact-checking.
Buuuut, words tend to draw out other words. So, when you see the name "Hy Lit" in print (without having heard of him before), your mind tends to think that the name is a stylized version of "Hi Light". It fills in the blanks in that way - mentally changing the "i" into a long vowel. So, the comment about how "dumb" it is to pronounce L-I-T as 'light' is not completely valid for this reason. For an out-of-towner, this would be a common error. If you're seeing it for the first time, that is.
All that having been said, as a news anchor, you have to know your market! Joyce obviously doesn't and that is where she fell down on the job. No matter who wrote the copy. Ask someone, for cryin' out loud. The man is a local legend - people know his name. As brought up before, this is like mispronouncing the names of local communities. It's a sure credibility killer. Botching it was a big enough mistake to make it into the paper!
I have a little knowledge in this area because I did national radio at one time and got clobbered by our Phoenix affiliate about my initial (mis)pronunciation of Arizona's Mogollon ("muggy-own") Rim. Didn't make that mistake twice. Bexar ("Bear") County, Texas is another toughie for someone from away.
But, when you are a local anchor, these issues are finite and you need to get the names right. It's not that hard. Or keep things in boxes because you won't be around for long.