my old Samsung Galaxy s2 died when tripping around Australia, just by being in the car overnight (where I was sleeping too). Apparently enough humidity that in the morning it was dead, board fried up
I have, phone in the pocket of my rainjacket, got caught in a serious downpour, water got into the pocket and because it was a rain jacket stayed there to the point it was sodden.
Screen on the phone died.
I see the point of waterproofing phones after that.
I never once lost a phone to water damage, despite most of the phones I've owned not being waterproof.
My pocket made of regular fabric seems to be sufficient protection.