By ROI, I mean getting into top unis/ prestigious job/ high performer in a sport etc?
I ask after a family friend spent around 120k on child's education and child dropped out of good uni course to become personal trainer/ influencer. Nothing wrong with that career choice imo but friend seems resentful/ annoyed that after spending so much money child won't be doctor/ lawyer / banker and they could have done this career regardless of where they went to school. It's as if they had expectations all along.
I have no experience of private school system myself and my DC will go to local state school but thinking about it if I was paying out thousands per year for DC to have top education, I'd probably have some extra expectations.