I think you're confusing the terms "Working Class" and "Proletarian" in basically the same way that I was pointing out in my post. And I want to make it clear, again, that I am not making the assertion that non-proletarian workers are lesser (or greater) in any way than Proletarians, just that they have a different experience of Capitalism that informs their political consciousness - which is why these terms exist to begin with.

The original distinction, of course, being the distinction between Proletarians, Peasants, and Slaves - all of whom are working class, but have their own relations to the means of production.

An Engineer is (typically) working-class, but is not a proletarian. Nor is an artist. This is why, even in their various insignia, Socialist states such as the GDR and DPRK have symbols for the Proletariat and Peasantry, yes, but also have separate symbols for Engineers and Artists.

Both groups - really, all groups - can become partially or even wholly Proletarianized. But such a state is not necessarily the default. Someone taking commissions to draw furry pornography is petty-bourgoise. Lenin himself excludes the Democrat-Bureaucrats from Proletarianism as a matter of course, despite most performing work for wages.

Many actors are partially Proletarianized, but fame should be considered a form of ephemeral Capital owned by the actor (in much the same way as a university degree) which alienates the celebrity from the general Proletarian class.