Relying on US is not something good anymore because US economy and influent to NATO is now diminishing. They also cannot rely to themselves either to face bigger nation like Iran.
This is why Pakistan protection is seek by Saudi. For Pakistan, it could become silver lining for its economic problem. But the deal must be open to know what benefit Pakistan can actually get....It is the time for them to share the Wealth to Pakistan instead of investing to Western nations and India
I think as Iran leaves Syria now, then Saudi should also realize the Hootis present. I mean just accep geopolitical reality to make the region more peaceful.