We have 'average' values for parameters such as bodyweight, and we have 'healthy' values, and I believe these are often confused and abused especially when people are trying to make a point.
I am below average weight for my height, and probably anorexic by USAmerican, SA or even UK standards, but am probably a healthy weight as so many people are obese and thus slew the statistics. A few weeks ago I was in Amsterdam and was shocked by the size of many, if not most, of the people I saw around me, and I'm referring to their bulk, not height.
My BP is 120/85. According to OFSO's figures, it should be 150/90.