I think people focused on the wrong metric, the BMI. They should have focused on the self-diagnosis that at 6'2" (1.88m) it would be "literally unhealthy" for you to weigh less than 100Kg. Even if you were a special case, like a body builder, to illustrate the weight we're talking about, Arnold Schwarzenegger was 6'2" and 107Kg [0] in competitions.

[0] https://en.wikipedia.org/wiki/Arnold_Schwarzenegger#Bodybuil...

That's true. I bought some body fat calipers recently for just that reason. They cost about $10.