They won't. The 1967 borders were broken by a war Israel did not start, but still won anyway. And Palestinians have refused any agreement on where the border should reside since then, which resulted in the current limbo situation. From Israel's perspective, if people wanted to keep the 1967 borders, they shouldn't have tried to invade (again) in 1973. Why would they go back to the terms of an agreement that was already violated.