I don't think any title alone makes a dog breedworthy. It is the total dog and the genetics behind it. The titles prove the dogs workability and temperament, but I'd never breed a dog based on the titles earned... If the handler or owner puts time and effort into titling the dog it doesn't make it 'better' than one that hasn't had those opportunities. That said~ titles are worthy of course, just shouldn't be the focus of a breeding program.
CGC isn't a title IMO....it is a certificate of passing a good citizen test/same goes for the HIT, just a cert, not a title.
Though of course AKC recognizes the CGC as a title. BH shouldn't be considered a title either, it is a stepping stone to moving on to earn titles.