In general it is not surprising. Even if this particular study is bad. There are certain areas of law work that are about analyzing large amounts of texts, drawing conclusions and writing other texts based on that and nothing more. That is literally the bread of LLMs. Those types of lawyers should be the first in line for unemployment, not programmers, not even close.
The same could be said about programming. Or if you want to be even more reductive, looking at a screen and pressing buttons to make the correct lights light up https://xkcd.com/722/