Maybe. It depends on the person and the situation.
How mature is this individual?
Has he/she been to Israel before? Can he/she handle the culture shock?
What kind of support system is in place? Is the whole family going? Or are there relatives (aunts/uncles) there?
Why does this person want to leave HS early? Trying to escape problems? The school situation has changed for the worse? Just wants to go to Israel?
What are the future plans? How will not having a diploma affect those plans? Or is he/she intending to get a GED?
There are probably several more questions that would need to be asked to determine what’s right for each person.
I don’t think a one-word answer is appropriate.