There are many reasons to lie about peace being around the corner, it is the default norm. It is in part to place the blame of further conflicts on your enemies, i.e. I wanted peace but clearly they did not.

There is a conflict of narratives and one way to help push your narrative is to act like it is the reality on the ground. Unless the US is going to send in a ground army or nuke Iran then all we have at the moment is a pointless stalemate and the longer this goes on the more people will be upset at Trump and Israel for creating this situation.