You need to have the understanding that there is NO WEATHERSTRIP ON THE PLANET that guarantees water not getting in door at all. The technology does not exist. ALL car doors have small drain holes on bottom of door to drain water that gets inside, in short they are designed to take on some amount of water getting inside. . The weatherstrip simply stops a LOT of the water from getting inside but not ALL, and no auto dealer on the planet will tell you the door is totally watertight at the bottom of window because it's NOT.
One incident of running window down in very icy conditions will cut the strip edge up enough that it will not wipe all water off, the ice frays the edge.