For years people will be displaying photos of their wedding, since it is that kind of occasion. Your clients - the bride and groom to be - will want the best and will want the quality guaranteed. If you choose to be a wedding photographer you can make a lot of money by doing so. With the money comes the risk which you must manage well.
If this is going to be your first wedding shoot you will want to make sure your contract is written up properly and a disclaimer included in it. If you don’t have a disclaimer you could be sued afterwards. There are a few reason you should not be held accountable for and they are failure of equipment, miss placed pictures after they were sent away, and photos that do not develop properly. Otherwise you could get sued for breach of contract.