I don't think I am "in the know" but Juco's offer a place for guys right out of HS to play while they may not be qualifiers under NCAA standards they can find a place to get back on track at Juco. Other guys go the Juco route if they are not happy with their offers, don't want to do a prep school and feel they have upside that is unseen or they have not had enough exposure for a D1 coach to have them onthe radar.
Juco eligibility requirements
NCAA Div 1/2/3 and NAIA summary Eligibility requirements.
D1
Information on Admission Tests and NCAA Eligibility requirements
Standardized Tests You Need to Take
SAT:Globally recognized college admission test; test how well you know reading, writing, and math and how well you can apply that knowledge. Register at www.collegeboard.com
SAT II (Subject Tests): Content-based tests that allow the student to showcase where they excel; only national admission tests where the student chooses the subject matter; Only some schools require or recommend this test for applicants; please check admission requirements for each school. International students may be waived the SAT II test requirement depending on the institution; Domestic students still must take it for required schools. Register at www.collegeboard.com
ACT: National College admissions test with subject area tests in English, Math, Reading, and Science; accepted by all 4-year colleges and universities in U.S. Register at www.actstudent.org
TOEFL (PBT or iBT): measures an international student’s ability to use and understand English at the University level; offered as both a paper-based test or internet-based test (depends on location of student). Register at www.ets.org/toefl
NCAA Division I Core Classes
4 years of English
3 years of math (Algebra 1 or higher)
2 years of natural or physical science (including one year of lab science if offered by your high school)
1 extra year of English, math, or natural or physical science
2 years of social science
4 years of extra core courses (from any category above, or foreign language, non-doctrinal religion or philosophy);
Basic Requirements
Graduate from High School
Earn a minimum required grade-point average in your core courses
Earn a combined SAT or ACT sum score that matches your core-course grade-point average and test score sliding scale (for example, a 2.400 core-course grade-point average needs an 860 SAT).
Eligibility Center Requirements
Register with NCAA Eligibility Center
Have test scores sent to Eligibility Center
JUcos IIRC only have to be a full time student with a General High School diploma and a 1.75 GPA. Refer to the link above for clarification or go to eligibilitycorner.njcaa.org/
Jucos themselves are places where guys can rebuild or get a career on track. Like everything else in life the next situation is going to be a repeat of the last one if thre is nochange in the basic day to day operation of a life.