This is a reasonable hypothesis.

The only problem with it is that it's been tested over and over again and been clearly demonstrated to be wrong.

Natural forcing from many sources are routinely included in climate models. We can measure the beyond-human-activity things and they're orders of magnitude smaller than the impacts from human activity. For instance, see figure 9.9 in https://www.ipcc.ch/site/assets/uploads/2018/02/ar4-wg1-chapter9-1.pdf, and the surrounding text where the natural components are, I think, reasonably well-described, or the more comprehensive but less-thoroughly-described results in the IPCC AR6 WG1 chapters on the factors affecting climate change (e.g. chapter 3). Because it sounds like you might be inclined to believe shoddy gimicky "results" that range from being lies to cherry-picked, you might also want to see such things debunked e.g. at https://skepticalscience.com/argument.php.

We're big boys and girls now. We have planetary-scale power.