Think of this in the context of what happens with the majority of other purchases you are making? How many of those have a "buyers agent" vs a sales person? I've bought houses in both the UK and the US, I preferred the UK approach where I found the houses myself (and in the US it's not that different with tools like Zillow etc.) and paid for a lawyer to handle the paper work for much less than the real estate commission that was paid (and part of the house price I ultimately paid).

In fact, you could really view the commission split paid to the buyers agent (from the seller) as part of that expense of the seller marketing their property.