I do agree the rich can buy outstanding horses, and have trainers to care for them.
Saying that, you do have to be a great rider to jump horses.
My horseback riding is limited to team roping.
My wife competes in Eventing and Fox Hunting.That is jumping in an outdoor environment. Speeds are a lot faster.
Anyone that can do that is an exceptional rider.
Ala Christopher Reeve. William Shatner was quoted as saying you could see the fear in Reeves eyes on the horse, he never should have been on it.

Ronald Reagan:

Slim Pickens"

FWIW, I assume the woman is a decent rider. Jumping on horses is not easy. But I don't like her form, although it seems to be what is popular now.