To me, it was effective as a reminder and a realization that Picard's thrill of living is vital to whom he is. His passion is what the bionic heart is all about, not the assholed stupidity of his past. I don't think it's at all unnatural for Picard to view his mechanical heart as a sign of weakness. It's not, by any means. It may even be superior to the original, in every way. But its not what someone would ever choose, or even want. And I think this episode kind of put that puppy to bed, the lingering doubts that Picard might've had about himself as a man ... maybe even as a Human Being. And I think Q would've wanted to make sure that Picard put the focus of his situation more on that than concentrating on his actual life and death struggle.