So … the thing about putting her on a stage is that you aren't necessarily trying to get the median voter to try to view Harris as more relatable. Or maybe you are, but that isn't necessarily your main objective. Your main objective is to make her seem presidential, i.e. as someone who could step in on Day 1 for a 78-year-old president. And I also think if you put her in a living room or something, it might come across as gendered.