Then why can you read a book, magazine, feed a baby, etc.? Honestly, I feel like everyone keeps backing into these ridiculously vague "well... safety" answers

Then why can you read a book, magazine, feed a baby, etc.? Honestly, I feel like everyone keeps backing into these ridiculously vague "well... safety" answers with no justification. The FAA clearly told the reporter HOW the rule came to be, through a hypothetical concern that was not supported by evidence. Just like this one.