Train on both methods for different situations. You need different tools for different jobs.
Point shooting: "3 yards, 3 seconds, 3 shots". (90% of the time)
Sighted shooting: "25+ yards" (When you care to send the very best)
That’s the author’s point.
Bingo....
depends on target and distance and situation. And then there is shooting from the hip like Matt Dillon. I practice that too.