That's just inefficient use of land.
On the battery point I agree.
I just did a cross country drive a few days ago. We are not constrained on land.
Or are you talking about a different Poland?
People don't take up that much space and there is a strong tendency for populations to collapse into concentrated cities. In general, across the entire human species. All cultures and countries behave this way.
I think you've got plenty of free land.
Pretty much all of the land in Poland is used - either for agriculture, forests or human settlements.
So like maybe 99%? Are you say it should be strictly 100% and none of it for solar?
You only need 1% of land for solar to sustain entire population.
I just did a cross country drive a few days ago. We are not constrained on land.