I believe they specifically mentioned wind because that was the specific form of renewable energy the grandparent was talking about.

As for why a country with vast access to hydro would prefer wind energy, Hydro requires large investments, is excruciatingly difficult to upgrade, interferes with local water flow and ecosystems, and in the case that either it is improperly maintained or a major accident occurs, can be very dangerous and deadly.

It is not cost-effective to build much wind power in Norway, because of excessive cheap hydro power. Statoil and Statkraft build them in UK, where the price and subsidies are more favourable.