Right as Rain????

i have just told some one to have a cup of tea and they will be as right as rain and it has just accrued to me that i have no idea wtf this means

How can you be as right as rain ???

Rain just happens...it has to happen

rain is a form of precipitation, which consists of droplets of water that fall from clouds of water vapour ✅

could be

Rain makes everything right 😊

how do you no it could make thing all left

Maybe you're right as rain, because rain falls to the right 😕 but then it also falls to the left........ Who came up with that phrase anyways?

Right as in correct, proper, okay etc 🙄

well then it might make thing wrong so then you would be wrong as rain ? right??

I don't think so