haha, good observation. You're right: The heavy seas and on-shore eroding waves need to be occurring at the time of high tide. So that they can beat up the normally higher dry sand, and pull it out. Contrast to if the zenith of the surf/swell/wave action comes at the ~6 hr. low tide time of day, then the waves just beat around in the inter-tidal zone, thus capable of much less erosion.
Murphy's law seems to dictate what you're saying. But we all cross our fingers and hope the right combination of ingredients coincide on the right times of day!
Low tide, it's perfectly flat out there, and I'm happy. Then it immediately gets dark and threatening, then a lightening bolt appears in the sky, then Beach Patrol wisely closes the beaches until the storm, and low tide, have passed. I'm not happy.