You have to be trolling.
Knowledge of what the Sun is doing is essential for anything we do in space, including studying the weather and climate, because solar radiation is dangerous to equipment as well as people. And down here on earth - someday there is going to be a solar storm such as happened in 1859, which set telegraph cables sparking across the planet. Today, such a thing would fry our phone and electric systems if we can't predict it with the certainty needed to, literally, shut down and disconnect our electricity and copper communication networks while it passes by.
And of course, while it is CO and methane that are driving climate change, the heat it traps comes from the Sun, so good knowledge of what the Sun is doing is needed to understand our measurements of temperature.