Nice list, but if you look closely at it, a lot of the QBs on it were playing their home games in domes (and some of their away games, too).
Completing 70% while playing in varied weather conditions is an achievement.
Completing 70% in pristine conditions while throwing to the some of the best receivers on the planet isn't worth mentioning.
Culpepper, Bradford and Cousins played in a dome in Minnesota.
Brees, Manning and Ryan all played in dome stadiums.
So there's Brady, Rodgers, Favre, Rivers, Wilson and Jones who played in outdoor stadiums. Pretty good list.
And the other guys? P. Manning, D. Brees, Ryan, Culpepper, Cousins, Bradford. Meh.