Not usually. But homeowners don't usually set the price themselves. Yes, yes, yes, yes, yes, technically they can. But a _realtor_ is in their ear telling them MORE MORE MORE.
Realtors negotiate for themselves, not for either buyers or sellers.
I did have one who dropped their commission a little to close a sale, but that's not a common experience. (And they still did very well out of it.)
also, they don’t get paid if something doesn’t sell for being overpriced.
it’s a market system.
Are they legally required to do that? How would you even prove it was due to them?