There may also be parental fears as to the kind of other kids a child could come into contact with in juvie vs. a program, and the kind of influence said peers may have as to future choices their child may or may not make. There is definitely an impression that folks harbor — not entirely undeserved, I might add — re. the juvenile justice system containing more high-level offenders than programs do.
Of course, there is generally a great deal more mindfuckery going on in programs than in juvie (depending on the facility), but most parents are unaware and/or uninformed as to both the short term and long term consequences of that sort of abuse...