We're surprisingly un-individualistic when it comes down to sea defense. This shows in things like the elections for the part of government that does water management and dyke maintenance: all the parties agree on pretty much everything.
I feel like we've got more trust in the government than people in the USA do too. I fully expect that if the dykes do break the government has a rescue plan in place and a playbook on the shelf ready to get dusted off.
After the 1953 North Sea flood a lot of things happened to make sure such things would never happen again. To quote a monument on Eastern Scheldt storm surge barrier, part of the delta works: "Here rule over the tides the moon, the wind, and us."