The reason why E doesn't help is because E requires us to go one more step to explain why people aren't wearing seat belts?(because they are not obeying the law?)
http://7sage.com/lsat_explanations/lsat-37-section-2-question-17/
... Preptest 73 is no different -- Section2, Q14 repeats the same idea ... benefits as Preptest 59, Section 3, Q18 while Section 4, Q3 repeats ... other tests, including Preptest 62, Section2, Q5.