Agreed, for most people this is by far the single largest monetary transaction they will make (aside from another home purchase) in their entire life. Some form of "assistance" during the process is necessary.

I'm a big DIYer and will go to great length to research and do things on my own. My Realtor (Redfin agent) payed for himself and then some during the home buying process. Your paying for their experience and knowledge.

My agent making statements like "I had our lawyer review our signed purchase agreement and because of X,Y,Z we are still ok" helped me understand why I'm paying a big company a lot of money to help me out.