You’re missing the last bit, though. It’s “believe the science, when the science agrees with my ideas”. The truth is, a lot of those people claiming IPCC should be listened to conveniently ignore the bits in the IPCC reports that don’t align with their opinions. Also, nobody has time to read the reports and spend years training to actually understanding them.
We are overall woefully uninformed about these things, to the point that the majority of people in some recent opinion polls in Europe believe that nuclear power plants emit greenhouse gases.