You are wrong, as to raising dikes regularly. For two reasons:
1) you can't raise a dike indefinitely, for the simple reason that a dike's foundations sit on very humid soil, basically a sort of muck. Raising it above a certain height makes the dike collapse. Ergo: significantly raising a dike means rebuilding it, on broader / wider foundations. That costs a hell of a lot of money, especially in areas where, historically, houses were built against the dike: you need to buy out the owners, destroy the houses etc. etc. The Dutch built a nationwide infrastructure of dikes and artefacts: the "Delta Works". Work began in the 60s, with the state borrowing massive amounts of money, of which the last euro was paid back only a few years ago. Doing that again requires that considerable financial risk be taken, as this time the effort would be even more humongous.
2) you can't raise an artefact, like one of the great movable weirs the Netherlands have in the various sea-arms and estuaries, at all, for simple engineering reasons.
I see where you are going, with your post. Without quoting or citing references, you claim that climate models are all crap. You are simply a denier of climate change who poses as a clever guy. Too bad I wasted my time and keyboard strokes on you.
You make it seem as if I were "running around in circles and screaming", i.e. as if I were hysterical. I am not. I am, however concerned about a point you completely ignore in your comments here, and that is the dynamics of ice sheet melting, of which we know not very much with certainty. It is very well possible that, when an ice sheet begins to melt, it reaches a "tipping point": a point where the whole process can not be reversed any more. You can do a simple experiment in your kitchen, in winter: take a well-pressed snowball, and put it on a warm boiling plate. Wait until half of it is gone, then quickly take it and throw it back into the snow, where it came from. If you are lucky, you'll end up with something close to 10% of the original volume; if you're not lucky, you'll end up with nothing.
Moreover, I am Dutch, and grew up there, though I live in another place now. I was born at about 5 meters below sea level; as a matter of fact, about 40% of the Netherlands' surface, about 60% of total economy activity and close to 70% of all real estate value are below sea-level. I have personally seen a dike with the water close to its summit, and water seeping in, by the enormous pressure, from under the dike. Anything in Greenland happening that might have increased ice sheet melting as a consequence a reason for concern ? Hell, yes.
C'est magnifique, mais ce n'est pas l'Informatique. -- Bosquet [on seeing the IBM 4341]