Ultimately had she immediately stopped to assist the victim and shown remorse, she'd have likely not gone down for this.
It's very difficult to convince a jury someone's death by way of a tragic accident you didn't mean to happen when you literally watched them die and then walked away calmly. It's even more difficult if you then take the stand and don't show remorse for your actions.
The facts of the case are.
The woman unnecessarily (as in, was not forced to, had no actual need to) approached the cyclist shouting and swearing
The woman made contact with the cyclist to one degree or another, resulting in the cyclist taking an evasive manoeuvre/being pushed into the road. this is the only slight contention in the facts as presented.
The cyclist went onto the road and was hit by oncoming traffic. She died.
The woman walked away and continued her day without coming to the cyclists aid or offering assistance.
The woman, whether intentially or not, caused the death of another person through her intentional actions. Similar crimes can have similar punishment.- Death by dangerous driving is a good example where stupid actions having unintended consequences may well result in jail time.