Knowing that you are friends first makes it easier to rely on that person. If you cant trust them, they shouldnt be your friend in the first place. Building trust and respect are very important in a relationship, and when you already have that from the friendship, the relationship will be even stronger.

Is it normal to be friends before dating?

Being friends before dating is never a bad idea as it means that there is nothing superficial about the relationship. In fact, the chances of having a successful relationship also go up if you are a friend first.