To produce 1 gigawatt of power you need 1000 square kilometers of wind turbines or 300 sq km of solar elements or 3 sq km of nuclear power plants. How much land do you have in your country that you are ready to deforestate in order to build renewables?
Predictability.
Renewables depend on weather. They only work when the wind blows or the sun shines. Are you ready to be able to heat your house only when the weather forecast is good?
On top of that, some solar installations are actually compatible with some foods, here's one article on that: https://www.dw.com/en/farmers-reap-double-benefits-with-sola...
Point being, land use doesn't need to be single purpose in your example.
In terms of the weather, this is why it important to have balanced installations and associated battery storage.
There is absolutely no need for single-use solar or wind area, anywhere.
Predictability: spreading out production units, using a mix (wind, solar...) and storage are key. https://www.imperial.ac.uk/news/180592/european-cooperation-...