Who Cares?
Three years ago I was in Costa Rica. One afternoon I decided to go fishing. Emptied my pockets and waded in almost up to my neck. Came out three hours later to find I’d left my passport in my back pocket.
The thing was completely soaked. It took several days to dry it out with many pages sticking together as well as all the stamps being washed out, with the exception of the Chinese ones, which were still perfect although the Chinese Visas had come unstuck and fell out.
A complete mess, but, since then I have used it forty+ times, many through the US and never had a problem.