That sounds like a crappy realtor. A realtor who describes their role as above is not providing a good service. It's a red flag anytime a realtor gives away their pay, especially half?! They tend to be the worst realtors so they have to give away tons of cash to get and keep clients. They also end up being realtors for redfin, etc.
A realtor who just delivers a message and paperwork is adding nothing of value. A good realtor makes your offer look strong, you look likeable, advises you on market, gets your offer accepted, gets the escrow closed, limits your chances of getting sued, etc.
I've learned 99% of agents are clueless. That "paperwork" can cost you tens of thousands of dollars when the boxes aren't checked in the right places and at the right times. A good realtor protects their client and makes sure that they don't step on a minefield left by the opposing realtor who understands the contracts and how to get the upper hand in negotiations, control of escrow, limiting damages, and a hundred other important items. That paperwork are real and actionable contracts.