Climate change=weather.
Earth has seen oceans rise for countless millennia Example would be all of the monuments off the coast of Alexandria Egypt. The Med is full of ancient artifacts that were once high and dry.
I agree with your central point, but the submersion of parts of Alexandria was caused by sudden earthquake subsidence, not gradual sea rise
One of the best fishing grounds of the Atlantic is the Hudson Canyon. It was the mouth of the Hudson River during the ice age. Lake Hitchcock was where the Connecticut Valley is now. Long Island Sound was Lake Connecticut. The earth is fine...