As I'm sure you know, the beaks have long valued property more highly than plebs.
As I am sure you know, this is not true. The "beaks" have to follow sentencing guidelines.
For the offence, it looks like it has been classified as level 3 - driving that created a significant risk of danger.
That has a starting point of 3 years custody, a max of 5 years and a minimum of 2 years. A guilty plea knocks of 1/3rd and the rest is about mitigation and aggravating factors.
If you have a problem with the length of the sentence, lobby your MP to ask for tougher sentences. The risk of that is that MPs only go for tougher sentencing where it makes them look good.
Given that none of us were there for the trial nor have seen the summing up, we cannot know the decisions that the Judge took to determine the sentence. As she is heavily pregnant, the Judge may have reluctantly considered that (given a guilty plea) the sentence should be set such that she is able to complete her sentence in the community so that she is not separated from her baby (mothers can stay with babies until they are 18 months).
As it is, lets stop blaming Judges for the state of the legal system and start blaming those who are actually at fault.