Synthetic respondents can help a team inspect an early assumption quickly. They are not real participants, and treating them as one creates the wrong kind of confidence.
A simulated response can make a proposition, objection, or audience distinction visible before a team spends more on research or execution. It is especially useful when the question is still exploratory and the next commitment can be changed.
Synthetic respondents do not provide observed behavior, customer consent, fieldwork, or measured market demand. They should not be used to claim that a market will buy, that a campaign will perform, or that a forecast is validated.
The practical value is a better next question. Use support, rejection, segment patterns, and persona reasoning to decide what needs customer interviews, experiments, or other primary evidence before a decision is finalized.