You won't save the working class by yourself. Things are always changing, and under capitalism it is often for the worse. As another commenter said, CNC was the bane of lathe or mill machinists. There are still machinists, but now there are CNC operators as well. Who knows how things are going to be, but I can predict that there are still going to be lathe or mill machinists and CNC operators.
I'd say take the job. You live in the present. Being working class under capitalism necessarily means to be exploited by the powerful. It's the same here. Work to put food on your table, while you organize, educate people politically, and participate to decision making.
