I agree- there should be more awareness of exactly what Omega's water resistance ratings mean. Here is a chart that shows not just the
depth rating, but also the resistance to pressure measured in pounds per square inch. Omega's ratings are
not just depth resistance.
The water supply to most houses is between 50 and 80 psi (exceptions when houses are on a well, where water pressure is lower; or when houses are supplied at the bottom of a hill from a higher water source, where pressures
might be higher- but international plumbing and building codes generally
limit water pressure going to residential homes to about 80 psi for saftey reasons). Most showers do not increase water pressure (unless they have a power head or some sort of a pressure pump).
The bottom line with showers is, bad seals you're going to have a problem with the average diver. Otherwise, you'll be fine.
I'm honestly unsure of the physics if a surfer hit the water's surface wiping out, but would agree that moving at 25 miles per hour would probably exert more than the 1 BAR of pressure the surface of the ocean roughly has.