If you're picking someone up (say, for a ballet lift) it is generally not inappropriate to pick a male up holding him at his chest level, where it is generally inappropriate to do so to a female, where a waist-lift is more appropriate. (Though generally waist lifts are easier, either way.)

In context, I understand and do not disagree with the sentiment of your statement, but I however believe the wording makes it too broad--the anatomical differences are still significant.

Love,
Herbert.