Lily made a lot of good points, and I have a few points to add myself.
Most agents you meet are full of it. I say this not to be self-loathing, self-deprecating, or to try to gain the respect of the investor community. I probably won't do deals with the majority of the people on this site, and I know that, and it's OK, because I'm here to learn.
I say this because it's true. Many agents will promise you the world to get the listing, and then you'll both sit their awkwardly as the property doesn't sell. This may create a "presence" for the agent by putting a lot of signs up, but it doesn't do anything for you as a seller. Similarly, a buyer's agent may brand himself as "Investor Friendly" but not have a clue. I'm probably guilty of this myself, not having had a clue about the 50% rule, notes, or the true inner workings of the REO Broker Brotherhood.
I can say though that I'm willing to learn. I want to learn for me, but I want to learn for you too. If an investor and I are on the same page, and I can act as a resource for them, that's awesome. But not because I'm a "doctor", not because I'm entitled to anything, and not because of any of the BS designations out there (which, btw, I'm happy to say I have none of).
As far as creating scarcity, I think that's the dumbest thing I could ever do. You want to buy or sell real estate? Sweet. Let's talk. Let me do my best to understand your goals, wants and needs and then apply my skills to fulfill them. Nothing special there, and nothing that I feel the need to keep from any of my clients. If you'd rather spend your time combing the MLS for deals or developing relationships with REO brokers, divorce attorneys, lenders and all of the other agents out there, be my guest. But you'll probably get fired from your day job, if you have one. Maybe you want to be a full time investor. That's cool too. If I'm not useful to you, you never have to use me, and I doubt I'd want to work with you much anyway. Not because I'm trying to create scarcity, but because I don't particularly enjoy making money without also creating value. Maybe that's a weird concept for some, but it's the truth for me.
So am I a doctor? Of course not. Do I pretend to be one or compare myself to one? Never have.
But am I worth my commission? You're damn right. Unless you disagree. That's fine too.