You actually make a really good point. I've never been against press conferences as I'm pretty neutral when it comes to them, but you are right, since their impact on what happens in the game word is somewhere between minimal to negligent, they serve no purpose and should be removed or changed. Its a waste of time and resources when they add more questions to them as the dont have any significant impact on the game world.
I think hardly anyone thinks press conferences have had a significant impact on the outcome of their FM game/career.