Not OP but I think both perspectives are valid. Real estate agents are not incentivized to increase your house price at the margin as much as the owner, they would rather just keep their fee high and sell your house at an ok price.

Maybe real estate agents should structure their commission more like M&A bankers and account executives, which often have tiered or ramped fees that encourage the best prices, e.g. if the selling price is below X you get 5%, everything above X you get 10%, etc