Yeah, this report is designed with a transportation agenda in mind, so the graph only shows a select set of emission sources to make the tailpipe emissions look as bad as possible. Add in all other sources of emissions and the graph doesn't look quite as impressive for the point they're trying to make.

Figure 1: In the 2019 statewide greenhouse gas emissions inventory, car tailpipes accounted for 119 MMTCO2e — roughly 28% of California’s overall emissions, and more than the emissions from the entire buildings sector and electricity sector combined.