The job loss is real and I won't be glib about it — but be careful welding it to the theft claim. Session work was already being hollowed out by loop libraries and stock music for fifteen years; the jingle was going to be automated with or without his specific tracks. If his case in court is "a machine can now do my job," he loses, because that's legal. If it's "they used my recordings to build it," he might win. Muddling the two costs him the winnable version.