This is where wind power, and even solar wins out. The wind is always blowing somewhere.
Lol no it isn't, at least not in the capacity required to power a nation or even multiple states.
Let's assume you have a multi-state grid to transport wind power from where it is to where it's required. If you have say 10 states, you need each and every wind-farm to produce enough capacity to cover all 10 states in case the wind is only blowing in one of them. So 10x capacity ie Completely and utterly impractical.
To give you an idea, wind friendly Denmark is littered with thousands of turbines. The complete fleet produces as much electricity as 1 single conventional station. It simply doesn't scale very well.
Wind power is already much cheaper than coal
No it isn't for the reasons above. Hippies will quote name plate capacity and tell you 1 MW of wind is cheaper than 1MW of coal, but wind only reaches name plate capacity 30% of the time compared to 80%+ for coal. So you need three times as many of them to achieve the same output. The other big catch is that during low or high wind they produce nothing, so where do you get electricity from then? Most people like electricity on demand.
Solar, wind, batteries etc are useful in small scale to cover certain use cases, but they will never ubiquitous. There is a reason no-one is relying on them 100%, and it's not a reptilian conspiracy.