There is a chapter in Stover's novelization (I don't have it on hand, so someone may have to corroborate this) in which Kenobi and Yoda discuss the Jedi's way of sacrifice. Kenobi states that despite the deep relationship between himself and Yoda, if Yoda's death would bring the Clone Wars one day closer to its end, he would sacrifice Yoda for the greater good. Yoda's response is that he would do the exact same thing.
This does not undermine one of your points (Yoda's reverence for life), but instead serves to turn it against your conclusion. If Yoda had not shown restraint and continued to attack the Count, either killing him or capturing him, he would have actually saved a lot more lives in the long run. What Yoda did was beautifully ironic in that even he could not escape the attachment and affection he held for his prized pupil.
I'm sorry, but the examples are manifold: Yoda shows incredible restraint against the Count in both of their conversations, and despite certain advantages, Dooku is forced to retreat each time.
Had Yoda gone after Dooku like he did Sidious, then the Count wouldn't have stood a chance. There's simply too great of a gap between them.