If the president in Secret Hitler believes the law passed to have been a force will the call of cards matter?
You are forgetting a key point. Lets say that the president passed 1 liberal and 1 fascist card there is still information to be gained. This revolves around the answers not only to this question but to previous ones as well.
Liberal president - fascist chancellor: Actual draw was 1 liberal, 1 fascist and one other and the pass was done to expose the chancellor as a fascist. In this case the president can use the fact that a choice was present to out the chancellor. However this can also be used by the chancellor to try and discredit the president and it all depends on how well you are keeping track of cards. It could also lead to people believing that both are fascist and the pass was done to get a fail rather than out one player.
Fascist chancellor - liberal president: 1 liberal, 2 fascist and passes both fascists. Learning the makeup of the cards (even if a lie is told) could help reveal the lies such as near the end of a cycle finding out that there are to many fascists cards drawn and that someone lied.
While it might not provide a lot of information it will still provide information and the act of not asking that question also provides information.