"I hardly think that's a fair comparison to make. Your lives are still pretty different. Just because you don't have the same motivations as she does doesn't make you any less of a good person than she is."
Other options:
no subject
"I hardly think that's a fair comparison to make. Your lives are still pretty different. Just because you don't have the same motivations as she does doesn't make you any less of a good person than she is."