I agree that the original doesn't look like a scan of pen-and-paper, but it looks real to me in the sense that it looks like a person made it, and it's not just

I agree that the original doesn't look like a scan of pen-and-paper, but it looks real to me in the sense that it looks like a person made it, and it's not just a cursive font. It looks too messy, and some of the letters are too indistinct, for it to likely be a cursive font. It appears consistent with a signature entry pad peripheral, a stylus on a tablet, or similar. I would say that largely rules out a security practice; if that were the motivation, it would make more sense to use a cursive font. As I said, I do think it's possible that she copy-pastes her own signature; but if so, the motive I would expect is reducing effort.