Ocean water is indeed an excellent source of cooling water.
Many thermal power plants (nuclear and others) are situated along rivers not because people were stupid and didn't realize the ocean exists, but because those power plants are sited to serve nearby communities and industries.
Sure, long distance electricity transmission is one solution (HVDC or traditional AC). Using ambient air as the final heat sink is another. Both have costs in terms of energy loss and higher capital costs, but are doable.
Many thermal power plants (nuclear and others) are situated along rivers not because people were stupid and didn't realize the ocean exists, but because those power plants are sited to serve nearby communities and industries.
Sure, long distance electricity transmission is one solution (HVDC or traditional AC). Using ambient air as the final heat sink is another. Both have costs in terms of energy loss and higher capital costs, but are doable.