Depressing indeed.
I know that you were probably just using Ditka's final season in 92 as a convenient milestone, but I would argue that their lack of playoff appearances has more to do with Favre (first full season was 92) and Rodgers in Green Bay, Sanders and Megatron in Detroit, and Moss and AP in Minnesota.
That is a lot of very elite offensive talent in the division for a sustained period of time, something the Bears have not had since Sweetness. There have been flashes with Marshall, Forte, and Hester, but the vast majority of the Bears pro bowlers have been players from special teams, defense, or the offensive line.
Fun trivia question- Who are some of the missing offensive players to be selected to the pro bowl since 92 that I did not mention or exclude above? Bonus points if you don't use google.