Even when a lower tension is requested, the local stringer will often think s/he “knows better” and will string closer to 60+. Or, their equipment is mis-calibrated.
Of course, the pros string tension depends on surface, temperature, humidity, the balls, etc. And, they have freshly strung frames for every match.
The image shows Nadal at 55 lbs and he probably takes one of the biggest if not the biggest swing at the ball.