You think those answers to your question were petty? You want to talk in terms of the planet? How's this then:
The Earth is only 3 ppm of the mass of the solar system. How insignificant is that?
If you're suggesting it's all too hard to replace fossil fuel energy with renewable energy - then I say let's not give up just yet.
Every year there are more and more solar power plants, wind turbines, geothermal power plants, wave energy installations etc - and lots of people have cut their power bills by switching to solar pv. Hybrid and electric cars are becoming more popular and cheaper each year as well.
