There are plenty of Realtors that are worth their weight in gold , heck, the average savings I've calculated to my buyers is around $10k per property compared to their last agent, due to the fact I know how to negotiate with banks.
If Realtors are useless, then 80% of buyers and sellers wouldn't use them.
And FYI , the last INDEPENDANT poll said that around 85% of people who have bought/sold homes themselves wish they would have used a Realtor due to all the legal issues involved with selling a house.
At a minimum , every person who buys or sells a home should have a lawyer involved. This added with the fact that there's about a 10% loss to sellers who sell without a realtor and a 5% loss to buyers who buy without one ,it's sort of a losing scenario.
I know how to get properties financed in my area, most of the time when I present a financing option/idea to a buyer, even with their hours of online research (And mind you, most buyers I deal with anymore spend about 50 hours online reading about real estate and the related stuff) they still haven't read online what I provide to em.
The national association of realtors has spent MILLIONS of dollars on developing the MLS , I'm sure you guys know that in the early 70s many MLS systems were utilizing electronic faxes to send B&W photos of homes to relocation companies across the US.
Doing a MLS system up untill very recently has been expensive and time consuming, anymore it seems to be a issue of having a good server and enough willing people to do it. I've seen PLENTY of local attempts to copy the local realtor-only MLS systems, and they've all failed misserably.
The problem is that the vast majority of Realtors aren't worth anything and the ones that are really valuable to their clients will continue just fine in a post monopoly market. Negotiating for REO properties is different than the typical transaction where the buyer finds the neighborhood and house they want online and the real estate agent is simply a glorified secretary.
The reason sellers that sell without a Realtor get less money is because of anti competitive practices like discriminating against discount brokers and preventing FSBO from being listed in MLS. While buyers agents should be appalled that their clients are getting less access to properties that may suit their needs it is not in the agents best interest to show properties that have lower commissions attached to them.
A real estate attorney (with fiduciary responsibility) would serve most buyers/sellers better than a typical Realtor.