That is exactly what she's talking about, they're the worst because a lot of them are misleading, they have a high sugar content because of the fruit which is one labelled as vegetables is actually a higher percentage then the vegetables.
Honestly I've travelled with two kids often at night and often long distances and always found a better alternative then prepackaged baby food. Even when my son first started solids. We drove a 40 hour round trip with a 1 year old and a 2 year old and never fed them jarred food. I just don't think they are a good option nutritionally.