Then go read the fucking reports https://www.ipcc.ch/reports/ https://report.ipcc.ch/ar6syr/pdf/IPCC_AR6_SYR_LongerReport.... you can get all the numbers and studies for free on the internet.

If you can't be convinced by simple explanations and if you can't be convinced by harder explanations then you are just spreading doubts and part of the problem.

edit: "what if we are wrong" fuck that shit, it's the same shit from the crowd of "but what if we develop interstellar travels and escape climate change consequences, haha gotcha" or "we'll just invent a carbon extractor in the next 10 years for the whole planet et voilà, ah!".