The conversion is a meeting, and nobody fills in a form to get one
Decision makers in this industry make contact by calling a person or replying to an email, which means form optimization is optimizing the wrong door.
The owners, investors and corporate real estate people who transact do not submit contact forms. They call a broker they know of, or they reply to something that reached them.
The forms on brokerage sites therefore collect a skewed sample: vendors, students, residential inquiries and the occasional genuine tenant. Treating that as the conversion funnel leads directly to optimizing for the wrong audience.
What deserves the attention is everything that makes a direct approach easy. Named brokers with direct numbers and email addresses, clear indication of who covers what, and no gatekeeping between a serious person and the individual they want.
Central contact forms and generic inboxes actively work against this. A prospect who wanted a specific broker and got a general inquiry form has been given a reason to hesitate.
The useful test is whether somebody who has decided to contact you can do it in one step without deciding which category they belong to.