I find people who advocate for renewable energy projects are almost always the same people who argue in favor of energy subsidies, too. Perhaps they know something about energy economics, the rest of us don't...
Especially because a more realistic answer is it'll be profitable either way but it'll change whether the return is higher than AAA bonds or not. It's not important. It only affects very marginal projects.
Other things can go right or wrong and change the numbers by a couple percent. That risk is pretty normal. It's not something wild.
And any farm that's already running or even half-built is still going to be finished and maintained and make as much power as it can. Once you already spent a big percent of the budget you're not getting it back, and the ROI on the remaining spending is very high.
Your strong dismissal of OP, and talking about how it "could be the entire profit margin", made it sound a lot more serious than it is, and that's why I disagreed with how you were commenting earlier and posted a counterargument.