I have no idea about this specific case, but at least historically it was a degree a lot of people fell into. Father and grandfather were lawyers at white shoe firm. Seems like a decent middle-class job. That undergrad classics degree only got them a low-level job at a publishing house. Maybe law's the way to monetize that degree. Or it just seems really interesting.

Then a lot of people discover they don't like actually being lawyers because associates at big firms work long hours and a lot of the work is very tedious. At least that's what I've seen with people I know. I'm sure the majority with law degrees don't actually practice law.