Scotland is microscopic in relation to the landmass and population that is the US. Yet... look at the sheer volume of wind turbines Scotland has to operate to get anywhere between 10% - 80% of their power generation, depending on the day and wind conditions.

You cannot build a reliable grid based on wind. It requires other non-temperamental energy sources to be available when the wind isn't blowing. Solar? What if it's an overcast day?

If you look at that chart - you'll notice Nuclear takes over the heavy lifting when necessary. So... why not just have a couple more nuclear plants and forgo the unreliable sources?

Using wind and/or solar does not automagically make your system better or more green. People have pigeon-holed themselves into a reality where only wind and solar are acceptable... and then we hide away the actual sources that provide the necessary backfill.