This is pure speculation, but I would guess it was simply expected information at the time. In some countries, it is still expected or at least common to see information such as: a portrait ; date and place of birth ; marital situation and number of children ; and so on.
What!? Some countries force you to state your marital and familial situations!? That’s insane. It’s illegal for companies in the US to ask about that stuff.
That said, some other people pointed out he had a military/aeronautical background, so height and health might come into play for certain jobs. That makes sense to me. You probably can’t work in the cockpit of a plane if you’re 7 feet tall.
Friend worked for the military overseas. Locals would send in resumes and include details such as their social caste and were horrified (or delighted, depending) when that information was redacted before being sent to hiring folk.
On the upside, it apparently became an upward mobility avenue for "low caste" folk who would otherwise not be considered for valuable positions.
The downside is clear if you're upper-caste, but my point was to reinforce the (challenged) statement that over-sharing in other cultures is both commonplace and intentional.
