There is a lot of room between being not as good as Detroit and bad. All he said is that when healthy this isn't a "bad" team and that it was competitive against the Rams. Frankly, the Rams are better than G.B. so if they can compete against the Rams, they can compete against G.B.
Yes, Detroit has handled their injury issues better. But, they also have better coaching than we do and many, many years of high round draft picks to build that roster. it only took them like 30 years to get this good with the depth to sustain injuries.