FYI, here's a pic of her car 'afterwards'...
Just like how people get off for drinking and driving.
But that's what you're missing here - it's not about "getting off". She was charged and convicted of a criminal offence (4, to be exact). She has a criminal record now for the rest of her life.
And not only that, but there are MANY types of sentences that can be had. The question was, "is Jail the appropriate sentence, or is there some other type that would better remediate her?"
For example, she has a prohibition against driving (i.e. she is not allowed to drive) for a period of TEN YEARS. She also is under probation (i.e. has to check in with a probation officer every so often). She also has to do community service.
What, in my opinion, is wrong with her sentence, is they are putting her in jail for 90 days, to be served only on weekends. The intention is for her to continue working during the week/see her family, but then she loses her free time on weekends. It doesn't do anything other than punish her for under a year (i.e. no weekend fun for 11 months). How is that beneficial? She won't "learn" because she lost her weekends. She'll learn by not being allowed to drive for 10 years. She'll learn by having to take buses, etc. She will learn because she is now listed as a criminal.
But what will jail do? It'll do more harm to her than good to society - she's not a danger if she cannot drive.