Tom,
You are exactly right in your assessment. Peach trees are more prone to split than other trees I grow.
I’ve got several mature peach trees right now which have started to split. I hate to lose trees. The good news is new peach trees are fairly quick to come into production. Commercial guidelines say expect to lose 5% per year, which covers splits.
I think peach trees are sort of a hybrid b/t annual crops and trees. Their growth patterns are more like annual weeds, but they take a few years to get into production.