Which is more promising, screen printing machine or quality inspector?

In the number of recruitment positions: the demand for quality inspectors is much higher than that of screen printing machines, and there will be more promotion opportunities;

Technology: Quality inspectors need to check all aspects, and the technology they need to learn is complicated, while screen printers only master part of their own technology. The quality inspector learns many skills, which is more beneficial to his future career development, so the position of quality inspector is more promising.