There is a difference between activity and action though, which it’s useful to understand.
You can think of it like this. Activity is doing things. From day to day. Moment by moment. It maintains the status quo. More of the same. Faster, cheaper, better but the same. Action is changing things. From time to time. When it is needed. It alters the status quo. Something new. Different, more fitting, better and new.
Customers don’t see functions. They have no idea which group of people within an organisation have done what when they come into contact with you. Finance? Nah. Marketing? Nope. Operations? Nada. They don’t exist from the most important perspective in any business, from the perspective of the customer. So why do these false divisions matter so much to those inside an organisation and is it helpful to think like that?