If i didnt have my realtor I would not have landed my house because of how competitive my market is. My realtor called me at 6 am on a Saturday morning before the listing was even up on zillow or redfin. I was there to see the house that afternoon and had a P&S agreement accepted before Monday morning before anyone else even had a chance to see the house.

Also the realtor had contacts of contractors and inspectors that she trusted so that the inspection and repair stages all went way more smoothly than if I was calling random contractors for quotes.

Again this doesnt apply depending on the market and price range that you are in.