That doesn't benefit the worker at all though. It is an overall detriment to the worker class as a whole.
In this case, no one is saying "less jobs bad". They're saying the hording of savings from job elimination is further increasing wealth disparity, shifting money from the worker class to that of the elite. It's not like the workers' salaries will go up or the cost of goods will go down as a result.
I'm all for eliminating useless busy work, but the rewards of that should be reaped by those doing the actual damn work. Assuming you work for some company and not for yourself, all that time you put into being more efficient and optimal does is makes your employer more money and gives you a dopamine hit for being told you're a good boy.