Question

what are reasons that people should sometimes read what other people said before eating out

Answer 1

Because, if you read the reveiws of a certain resteraunt, you can realize if the establishment has bugs,mold, or any other bad things that will/could make you sick. Other than that, you can just see what it has to offer, and if others like it as well.
~Hope this helped :)

Answer 2

They should read the reviews of how people liked the restaurant's food. If they don't, they may find themselves hating how their food tastes.

Hope it helps :)