Since all exchanges in a market economy are voluntary how do we know that the exchange will probably benefit all participants?

In a market economy, exchanges are voluntary, meaning that each participant engages in a transaction because they believe it will improve their situation. This mutual benefit arises from the principle of comparative advantage, where individuals or entities trade based on their unique strengths and preferences. As long as both parties perceive the value of what they receive as greater than what they give up, the exchange is likely to enhance overall welfare. Moreover, competition among participants encourages efficiency and innovation, further increasing the likelihood of mutual benefits.