Again, I think Rowdy was a better option because a) he was more likely to make contact and b) if he did end up making contact, the likelihood is that it would have gone to the right side of the field potentially allowing the baserunner to advance.
With Wiemer, there was a very high likelihood of a K or a rollover to the left side, either of which wouldn't advance the baserunner.
I don't see why Anderson wouldn't have been a capable replacement defensively, with Taylor moving back to CF. That situation seemed to call for "going for the win" imo.
Thankfully, it didn't matter and you're right that we probably won't ever find out CC's reasoning.