> Who said anything about adding the speed of the non-CPU components to the CPU?

You said, there: "when you talk about SoC speed, there's more than just the CPU to consider".

> I referred to adding the speed of all the components of the SoC.

...which in the case of the C515's SoC apart from the CPU include a GPU and a DSP, the latter two being non-CPU SoC components in the context of this discussion. (Sometimes, the SoC as a whole is referred to as a "CPU", but clearly not here).

> Why should it be dishonest simply because it is different from non-SoC systems.

It's misleading because it's *not* different from non-SoC systems in the context of clock speeds. Clock frequencies don't work in a way that it would technically make sense to add them up across different components, no matter if SoC system or non-SoC system.