This just emphasizes that you need to have all the critical components in good condition. Solid through-hulls, top-quality hose, double-clamped.
The Trident hose to my sinks is so stiff, it could disconnect from the sink and nothing would happen as the top end will always be above the water line.
Closing sea-cocks is fine, but that should be a failsafe, not a substitute for quality components and proper maintenance.
I agree, that is exactly as I see it.
I did not think I would need to do preventive maintenance on a kitchen sink; failure of this part was not something that I expected. Of course now I know that this can happen but I assume that there may be other things that I do not expect to fail. Therefore I want redundancy. Therefore I close the seacocks.