> Most likely, you'll have your manager and HR scrambling to get a proper handover, and sometimes followed with private comments berating you for your "lack of professionalism" and other comments like "why are you doing this to us" and "can we keep you for a little longer, please" (in violation of HR policy for the maximum notice period).
And your takeaway from this would be that that worker is an invaluable member of the company? They don't care about workers, they care about their bottom line. If they could easily replace workers, they wouldn't say anything and would just make sure you clear out your desk before you leave.
I'd argue being able to affect the bottom line is not nothing (especially if you compare the wealth difference between you and the company), and the source of what allows you to negotiate salary hikes, for example.
And your takeaway from this would be that that worker is an invaluable member of the company? They don't care about workers, they care about their bottom line. If they could easily replace workers, they wouldn't say anything and would just make sure you clear out your desk before you leave.