The email sounds like a college student participating in a sociology study for class and asking the professor for clarification. This is exactly the kind of thing that I’d expect to ask about gender along with a bunch of other personal information. The goal being to see if any patterns in the responses.
Sociology in general does have the problem that categories are important and helpful to spotting patterns, but people are very difficult to categorize. People just don’t fit cleanly into categories
All of that plus the substantial price tag and their stupid subscription service.
I would have been very interested in an electric VW(loved my old Passat), but they completely botched the rollout of their ID series.