Why is everyone transferring out of Spalding ?
Define "everyone".
Kids transfer all of the time. How many are you talking about?
5-6 kids heading back to public schools.
Meh, not uncommon for this to be 2-3 kids per school, per year.
This happened at MSJ with the 2025s I recall, after few/no 2025 freshmen made varsity. You'd have to ask those 4-5 kids or their parents what the bottom line reasoning to jump to public school was, or what they thought they had been promised at MSJ, but they were recruited in a group, and left as a group.