No.
Even if you have no source of money you don't need to commit muggings to get enough to live. Burglary is safer and produces enough. People commit muggings to get enough money to feed their drug addictions.
And most people enter the illicit drug industry at an age when they don't actually need money in the first place.
Rosseau's point is not what is the best way to cope with total rejection...no education, no chance of employment, and no attempt on the part of society to rectify the situation. It is not a question of whether the guy does armed robbery or sneak thievery. It is a matter of a system that places certain individuals on an inexorable path to incarceration or perhaps execution by some cop on the street. Drugs are just one of the parasitic industries that torment these poor devils on the outside of everything and yes, they mug and rob to get their temporary respites from withdrawal. So what. It was self medication against the pain of total rejection. And you with your ever so snide criticism of the poor devil's method of crime is out of place. Your "No" is just a way of expressing your lack of understanding and perhaps more important, your lack of concern. In a way, you are that criminal with a little bit of acceptance on the part of others in your life and are completely unaware of how lucky you are.
I had a conversation with two of my students a couple of days ago. They were apparently very puzzled about the concept of orphanages and/or foster homes and what kids actually do at that point when they turn 18.
One of them said "Don't they, like, keep you living there for a couple of years, let you save up money while you get a job?" Her friend replied, "No, they give you an apartment and pay some of the rent for you until you get a job... or something... I mean, they kind of HAVE to, right? You can't really do anything without money."
I chimed in: "It's neither of those things. Most places, foster kids turn 18, they move out."
Girl#1: "How do you get an apartment with no money?"
Me: "You don't."
Girl#2: "How do you eat with no money?"
Me: "You don't."
Girl#1: "So... what? How does that even work?"
Me: "It's called 'poverty.' That's pretty much how it starts for most people."
Girl#2: "So what do you do, then? People don't just starve to death in the streets."
Me: "Yeah they do, that's called 'being homeless.' There are are two things you can do about it. You can either get on welfare until somebody gives you a job that pays enough to get an apartment and something to eat, or you can get into a college that gives you free room and board. And you can't usually get into college unless you have parents that can pay for it, which foster kids don't usually have."
Girl#1: "That's really depressing."
Me: * shrugs *
If you ever wonder why so many people in America have such an unshakeable lack of empathy or understanding of the existence of poor people, I suggest it may be as simple as many Americans having really no idea what poverty IS and no direct experience with it themselves.