Accomplishing great things with Torah requires a clear definition of what we want to become
"..they’re somehow achieving their life’s mission through a half-asleep Daf Yomi shiur"
This seems very unkind. Such people have about 45 minutes to learn something after a long hard day. Perhaps you would rather they learn something else for 45 minutes, but they are not achieving a good part of their life's mission with Limud HaTorah?