The problem with market share ETFs/indexes

The problem with indexes ETFs or funds is that they hold bad companies like Nortel. XIU for example still has a small amount of Nortel. Maybe it's time to look at dividend achievers indexes ETFs like CDZ which doesn't hold Nortel.

I wonder if dividend achievers companies have less chance to go bankrupt since they might have a more solid history of good revenues and a more sound business model than other companies ...