The energy deposited on the earth by the sun dwarfs the miniscule waste energy humans produce. And the energy rediated by the Earth is also orders of magnitude larger. The gases emitted by the oceans, animals, volcanoes and other natural sources als far exceeds man's emissions. Yes, a butterfly beating its wings affects everything in the world to some degree, but is it significant and relevant? I think not.
Where is your data that human energy waste is at insignificant levels? CO2 levels have significantly risen above overall climate patterns. since Industrial Revolution. The butterfly analogy is misleading.