If you're worried about existing jobs being lost, aren't you also worried about non-existing jobs never having been created? Imagine we don't have parfocal len

If you're worried about existing jobs being lost, aren't you also worried about non-existing jobs never having been created? Imagine we don't have parfocal lenses and you need multiple cameramen with all different fixed focus lenses filming different parts of the scene, or some other contrived example of less technology creating a need for more jobs. That would surely be a better world by your standard. Should we try to eliminate some technology to create extra jobs? Where is the correct balance? Do we currently have not enough cameraman jobs or too many? It won't be exactly the right amount by coincidence.