Not the way the industry works. Realtor's know about as much about loans as loan officers know about real estate: practically nothing. You ask your realtor about loan rates, origination fees, discount points, and the right answer is absolutely "that's not my job, but have you seen this master bedroom suite?", if only because any other answer's likely to be wrong.
Typically, when my wife does a closing (she does real estate settlements at a law firm...about four real estate settlements a day, on average. That's a hell of a lot, by the way), she's dealing with the buyer, seller, their agents, their attorneys, and the loan officer. Seven people, all told, involved in a single sale of a house. Typically, not one knows anyone else's job - literally. The attorneys are about as ignorant about real estate sales as the loan officers are about real estate law as the agents are about real estate loans. "That's not my job" is an entirely valid answer...because that's how the industry works. People specialize in real estate; it's very rare for a single person to know anything outside their specialization.