And that's kind of the point of "defending" the GM version they call a locking differential: Most of us will seldom if ever venture into places where it won't do the job.
I don't rock climb, mud bog, thrash in deserts, or go offroad nutso with my trucks. Pretty much know where I can go and where I shouldn't in the areas I travel, so no problems.
The time I got the S10 hub deep in the goo, was a mistake on my part. Pulled off the edge of a stoned parking lot because it was full, didn't realize the surrounding muck was that bad.
Realized that was a dumb move instantly, but got out of it. Cost me a small fortune at a car wash to de-funk the truck, too.
