Well, I'm personally against keeping horses as a pet/investment, so I'm good with it on the basis of cruelty.
But in terms of safety, she's probably had more training than most cyclists and those holding a CBT certificate. What's scary is that she's had the training and is still out there texting.
I assume she'd do the same regardless of what vehicle she was in charge of at the time, which frankly terrifies me. I had a very close pass last week by a young lady "doing her eyebrows" whilst driving.
Can we not just ban teenagers?