Is it the Master who says that? "The man who makes people better". But yep, it's true. Even if it's not directly, such as in the case of Mickey and Jackie, his appearance in Rose's life and showing her what she could become in turn shows them they have so much more to offer.

Honestly, while I love what Rose saying no brings to things, I will never understand how she could. Doctor showed up and asked me I'd be gone before anyone could blink!

On a horrifying note, their will be more commentary when I continue watching. Cause really, this amuses me :D