It doesn't matter what your job: call-centre operator, CEO, consultant; everybody needs time to think and breathe.
In an Old World of Work it was built in between opening the post, dropping down to the typing pool, waiting for a train, walking....
In the New World of Work the relentless quest to get us to communicate and communicate now, most forcefully illustrated with the increasing provision and use of so-called productivity tools such as instant messanging means there is no time to think.
And therefore there is little of worth to communicate.