You can certainly choose to go with a family/friend member or with the DJ/venue's offer, like every decision for your wedding you are completely at liberty to do so!
The biggest advantage you have paying for a professional MC for one of the biggest days of your life is that we, as event managers, are the MOST able and experienced to pull all the crazy elements of the reception together on the day. It's what we do best!
Just like it's no question that you hire a photographer as they are highly skilled in getting the right shot and edit of your once-in-a-lifetime photos, and MC is no different. We are an ESSENTIAL part of managing the chaos of a wedding and we thrive in it for you and your guests' benefit and entertainment.