They may be less qualified on the subject to understand the fact of global warming. Or they want this beautiful planet to get destroyed to everyone's surprise.

It's understandable to feel frustrated about the complexity of climate discussions, but it's important to recognize that scientists worldwide have extensively studied all major contributors to Earth's warming, including direct heating from human activities. Direct heating like from engines, buildings, or industrial processes, is indeed real, but it's relatively small compared to the effect of greenhouse gases trapping heat in the atmosphere. The Intergovernmental Panel on Climate Change (IPCC) and UNFCCC work with data from thousands of highly qualified researchers to ensure conclusions are evidence-based.