To me, it is not a debatable preposition at all. Legal profession may be the last choice for some, but the first. choice for others. Taste of the individuals differs. Choice of people differs. Well, if you compare with other professions, like doctors, engineers, IT professionals, etc., you have to find out the numbers of professionals that are already working in different professions. I mean, to find out the fact as to whether legal profession is the last or the first choice, you need to collect the statistics of numbers of people in legal profession, medical profession, IT professions and other professions, then only one can infer whether legal profession is the last or first choice based on the highest and lowest numbers of professionals in these different fields. As rightly said by learned friends, every profession is noble, provided it is performed with sincererity, dedication and honesty. Income may varies acciording to the amount of hard work put in, but one can earn a sustainable income from any of the profession, provided you devote yourself to the task you are taking up.