The thing with having work done is you have to accept that you will look a little 'done'. It's a play off between that and looking as you are, and picking the least worst option. If you're bothered, that is. I certainly don't judge someone. As PP said, we dye our hair, and there is less adverse reaction to Botox than there is hair dye. And it's semi permanent like hair dye, so if you don't like it, or you get a brow drop just wait a few months. Fillers have risks though.
Most women in her position and scrutiny would do exactly as she is doing. Myself included.
She looks amazing and you need rock solid self esteem about the way you look to do what she does, so good for her.