A depressing read! I agree though, she certainly fits the bill.
She hosted a dinner at her place last year, when she came on board and wanted to help her team be cohesive (She manages us 6, each of us 6 manages a team of 10-12). All 6 of us arrived, bringing a potluck dinner etc. It went fine, we talked, laughed and had some drinks. Her husband is nice, but very reserved.
It wasn't until afterwards that I put words to how I felt. I messaged my colleague that something felt off about the house. Colleague responded immediately "It felt manufactured. She had nothing that was 'her'. It was like a real estate agent had come in and prepped the house to be seen as modern and inviting, but it had no fucking warmth". She was right. I'm yet to see a lick of personality from my boss, it's always whatever she thinks people want to see, or need to see.
Apparently she plays in a band, but the instrument changes from conversation to conversation. She enjoys clay bird shooting, but has brought it up once in conversation and never again in the 18 months I've known her. Sure people can enjoy hobbies and not talk about them, but the number of interests mentioned in passing is staggering.
It's.. Wild, man. Truly wild.
Plus! As you've articulated, this is commonplace in those roles. My next step is into that exact role, and I am nowhere near vicious enough. I got promoted because people know I care about them and they trust me but I do genuinely worry I'll have to sacrifice some of 'me' to make it at the next level. I will try, but I don't have high hopes.
If I could 'create' for a living, I would.