Definitely not. These are supposed to be higher-quality bins that also ship with higher stock clock rates (both base and boost) and are rated for them.

I don't know how common this is across the whole population of PC buyers, but personally, I have for sure bought K-series parts then not clocked them past their stock settings, trusting that they are rated for it and deeply uninterested in any OCing past that. (I prefer my machines stable, thank you very much.)