It’s the greatest job in the universe, if you’re cut out for it.
Don’t pay attention to the details of the piece you quoted, it’s a hopeless attempt at generalising how things work across institutions, across disciplines and cannot be taken seriously. 90% of all journal papers are superfluous? Sure.
Being a professor at a research-intensive university is a curious mix between complete freedom to think and act as you like, with no-one telling you what to do a day in your life, and crushing, chest-tightening, sleepless nights-inducing pressure to succeed.
Boiling it all down to simple terms (and speaking about research-lead Schools) the people who are cut out for it already experience this latter pressure in their training (degree, PhD, postdoc etc), because they put huge pressure on themselves to be the best. They’re used to it and they can deal with it and put it to a positive use. Those who are not cut out for the professoriate (nice terminology Red Stilettos :)) either feel the pressure and can’t deal with it, can’t work effectively under the conditions; or just don’t feel it in the first place enough to be competitive.
This drive and ambition is the single most discriminating factor that separates appointable and unappointable candidates at interview.