Both Egypt and Jordan are US protectorates with no regional superpowers threatening their ruling regimes. Jordan couldn’t if they dreamed of it, Egypt might have but the US shows no interest in toppling its regime and mediation between them and Israel has been going about as well as possible given their histories.

You’re right, they could chill and be fine. If they trusted the US, or Russia, or China enough to protect them, or trusted Israel to leave their regime alone for the next 100 years. Do you think it’s reasonable for them (the current theocracy) to have this trust in their current position? I find it much more rational that they do not.