Well, my guess is that nearly all DL begin their JD studies with the intent to become a lawyer. They look at the stats and say "Ok, I'll be in that 15% that passes and gets licensed." For a few this works out fine, they get licensed, and have successful careers as solo practitioners or small firm lawyers. For most it doesn't, and these careers could offer viable alternatives.
I would agree with this, if we removed the work "viable"
Depends on the individual. If someone is smart, personable, and knows how to hustle they can make a decent career out of one of these fields.
On the other hand someone can have a JD, pass the bar, and still be unemployable because they can't get along with people, lack common sense, etc. It all comes down to personal attributes (or lack thereof).