We don't only need variation, we need rhythm. We live in an a-rhythmic world where in the evening the morning events feel like yesterday, where weeks whoosh by like days, rattled with the constant flurry of calls, messages, notifications and whatnot. There is no pace if one does not set it by himself.
> We live in an a-rhythmic world where in the evening the morning events feel like yesterday
I seriously think this is causing mental dysfunction - depression for instance. Of course I don't know of any way to prove this other than experience - we react to same situations in the same way and we feel stuck/frustrated when we experience repeat cycles of the same thing - that has got to have some negative impact.
I think we can do some things to make it work better but ultimately lot of things are determined by your workplace culture.