These analysis are not comparing apples for apples. Renewables don't supply base load and hence they sell energy when people don't need it, which is why they are achieving lower prices.

Maintenance and depreciation are much larger costs because the asset is the business for wind farms. Who cares how much operating profit you make, if your depreciation is higher than it?

To understand depreciation, consider a guy driving Uber making $30/hr in an $80k merc. He might be making good operating profit, but when you consider he has to replace the car in 5-10 years, spending another $80k, is it really that good?