No - you could be a plumber, a spy, a layabout, a mental patient, a ... ah, make up something yourself. But, you don't HAVE to be a lawyer!

idler, loafer, slacker, layabout, lounger, shirker, loser, hobo, vagrant, tramp

That's a conflation of two different terms with similar meanings: layabout (n.), and laze about (v.). Both terms refer to flopping around doing nothing.

The shiftless man spent his days lounging on the couch, avoiding any form of work or responsibility.

A lazy person can be called the following names; bum, clock watcher, couch potato, couch potato, deadbeat, good-for-nothing, goof-off, goof-off, idler, laggard, layabout, lazy person, lazybones, loafer, lotus eater, lounger, malingerer, moocher, shirker, slacker, sloth, sponger.