Your experienced Utah divorce attorney knows what he's doing
There MAY be circumstances wherein you can represent yourself in a divorce, but generally this would be the type of divorce where it was a very short marriage, there are no children, no marital assets, and basically little to fight over other than whether the ring should be returned (it doesn't, it was a gift). This would be the equivalent of changing the filters on an air conditioner, most people can do it themselves.
However, if there is marital property, children, joint bank accounts, etc., you will do yourself a favor by getting an experienced Utah divorce attorney. Even if you and your spouse have agreed on how things will be split (an uncontested divorce), you still want the language in the decree to be crystal clear. You want the decree to have language that usually isn't included on a "do-it-yourself" template, and isn't something that most people would think of.
The benefit of getting an experienced Utah divorce attorney is he (me) will have years of experience drafting divorce decrees. He (me) will know what needs to be included, what to look out for, and generally, have knowledge about what needs to be included that you wouldn't even think of.
It is cheaper and easier to do it right the first time
So if your decree fails to clearly state what happens when your wedding falls on your spouses parent-time weekend, good luck getting the court to step in. That would not be considered a significant and non-contemplated change of circumstances. This is a simple example, but trying to determine whether a special event trumps standard visitation is something that often comes up after a divorce, and you WANT clarifying language in your Utah divorce decree.
In addition, often times when a couple is getting divorced, a court will implement temporary orders in order to govern the parties until the divorce is finalized. This way parties can have guidelines/rules that help them get along. In a modification process, a court will not deviate from the written decree unless there is a very strong and compelling reason.
This means that if your spouse has sole physical custody per the decree of divorce, and you want to change it so you get sole physical custody, even if you have a good reason, unless the court finds that the children are in harms way when with your spouse, he or she will keep sole custody until the modification is finalized. The modification process can take as long as a contested divorce, so if you end up in trial over the modification it could take months or even years, and during that time the status quo will stay in place.