As a Realtor, I find it extremely valuable to have the "build up" time to get to know new clients, answering questions along the way, and getting a feel for what is important to them, so that when we write our first offer, I already know what things we need to focus on and how to get an offer accepted that they can be excited about!
One of the best reasons to use a Realtor when you are looking to buy a home is that, typically, the Seller will pay your Realtor's fee!
The Seller saves money by not paying any Realtor fees, and, in theory, the Buyer saves money because the Seller gives them a "no Realtor", below market value deal on the house.
Places like 5 Mile, for example, are less walkable if you are trying to get to a grocery store or even a cafe, but they're very walkable if you want to walk your dog, take your children out for a safe bike ride or walk, or walk to a park.