- selling your house, at the end of the day, is quite the undertaking. A lot goes into it, it can get emotional, messy, and sometimes quite complicated. Having someone that does it on a daily basis can be nice and really smooth things out.
- people are too attached to their homes emotionally. More often than not, when trying to sell on their home without a realtor they will not have it in a saleable condition and price it too high for the marketplace. It will sit and not sell, or they will get an offer that is appropriate and be offended and not sell it. A GOOD broker will bring facts, data, and logic to the table so that a person that is actually committed to selling their home will get the job done.
If people saw their homes for what they were when they decided to sell them, a product or a piece of property and nothing more, the real estate industry would die in no time at all.
Then again, there are a lot of swindlers out there too, so it's nice to have someone as back-up to watch out for those types of things as well.