I only know about the US.
>It is still the buyer who pays even if it is the seller who pay the commission since the commissions are baked into the sell price
This is a trivial characterization, just like an individual who buys lettuce at the grocery store pays for the wages of the person that grows and picks and packages it.
A buyer does not have much incentive to not use a real estate agent because a seller using a real estate agent has already agreed to pay x% or $x to the sell side agent, who will give a portion of that to the buy side agent.
The reduction in costs only comes when purchasing from a home being sold without the use of a real estate agent (“for sale by owner”).