I recently graduated college and earnt my BA. The courses were challenging, and did in fact contribute to my decline in meeting attendance. The exams were rigorous and I had
to study a week in advance.
I did get asked a lot what my schedule was by the elders and I told them there was nothing I could do about it. They just left me alone.
Does college education affect meeting attendance? Probably. The demands of the Society conflict with the demands of education.