The crossover point in any grid that has significant gas presence - which is absolutely ANY "renewable" grid- is not a COP of 2. It is 3. That is, per this graph, 5 C. A temperature at which if you do things right, process heat (ovens, showers, humans) should be supplying enough of the required delta T that you really don't need to spend a lot with any energy source. And that's the marginal crossover point, not the "I need to remodel my home" crossover point.
Just... what happened to the meanest part of self-criticism that science bodies used to have? Do they think other people won't ask questions? Because I'm sorry, they do so a great deal more now than ever. Many of those "questions" are stupid. But some are not, and shouting them all down means people should distrust you.