> sentiment
...
> theory
these two words aren't interchangeable
> Jean-Jacques Rousseau, Adam Smith, Wilhelm von Ketteler, Louis Blanc
...
> generic cog-in-the-machine critique that is explored by many other people
literally only one of the names you mentioned were writing post industrial revolution - the rest had literally no notion of "cog in the machine"
you're trying so hard to disprove basically an established fact: Marx's critique of exploitation of labor post industrial revolution is certainly original and significant in his own work and those that followed.