Vocational hazard

"What do you think about vocation, Seamus?"
"Ah do-on't."
"You don't wonder what your true calling is?"
"Ah'm doin' it."
"You were called to clean septic tanks?"
"Look," he poked the rancid air between his finger and my chest, "'Callin'' is what you lazy, starry-eyed dreamers want to do instead o' work.  Ye make up words like, 'vocation' to legitimize it."
"You can't poss--"
"Fook ye, get a job."
"A vocation is a job, it.."
"Not if no one pays you for it, it ain't."
"Dude, sometimes you have to strive for something, like olympic athletes or artists or.."
"Oy aye, and everyone loves those wankers, 'cept for the one payin' their room n' board!"
"Didn't you dream about being something when you were a kid?"
"Oh aye."
"What?"
"Ah dreamt a cleaning shite holes.  And here ah am!"
"You're a miserable bastard, Seamus."
"Vocational hazard, mate."