It does not make you stupid, however, passengers are not (in theory at least) supposed to open the exit until they are instructed to do so. If they are unable to hear the crew's instruction, then it does cause a problem.
I am also against passengers with glasses sitting in exit row. This is because they may have difficulties observing external dangers prior to opening the door, which they are expected to do.
You may say, "But they have glasses on and so they can see" - glasses, unfortunately, do fly off in a major impact (for that matter I am also against cabin crew wearing needing glasses, although I believe discrimination issues etc have caused many countries to permit cabin crew members that wear glasses) and also present extra danger to yourself. Once the glasses have flown off and you are unable to see, you may have difficulties making adequate observations to assess the dangers outside prior to opening the door.