Correct. They expressly call that out as being a disadvantage for MA when pointing out certain types of locations are doing better on average with a few exceptions.
IMO this version is useful data, but it would be more useful if they also showed other variations. How many states lose kids that go out of state FOR college, what % of people who go out of state for college then come back after? (made up example) Say Maine has a ton of people go out of state to get educated but then bring all that knowledge back home, maybe that says people from Maine are dedicated to their home but don't think the education is good enough there to let them do what they want.
Each of those is an interesting data point with different ramifications.
Nobody comes home to Maine if they leave. At least not for ten or twenty years until they have dug themselves out of the hole.
source: Native Mainer, who moved to New Hampshire to get a decent job, who would love to go back home if the whole remote IT job revolution ever actually happens.
I sort of thought that might be the case but it was the first thing other than my own home state to come to mind because my Dad is planning a trip up there for next year.