You are a lawmaker. Reading the bill is your job. If you are incapable of understanding it, you are not qualified to hold that office. If no one is capable of understanding a bill then the body of lawmakers should reject it until an understandable version is created.
But Conyers was hardly an exception - most of our politicians see themselves as "celebrity leaders and teachers" of the deplorable masses. The details of the job can be left to the staff, it's all about engendering emotional responses to hot-button issues and collecting the payoffs.
“You are a lawmaker. Reading the bill is your job.”
Not if he was there for mere appearances sake. I think his constituents just liked seeing him up there. Most of them didn’t care what he did...as long as he looked cool and sounded smooth doing it.