Nothing is worng with more guys on base, I'm just saying I'd rather have Votto hitting with a runner on first than some one else with that Runner stealing second and Votto walking. I think the Reds chances of scoring a run are better with Votto hitting. I think the chances of a 3 run homer are better with Votto walking, but, IMO, there is a lot more chance of getting nothng as well. The drop-off from Votto to anybody else is huge IMO.
You also need to factor in the runner getting thrown out or picked-off and now Votto comes up with nobody on and two outs. I don't risk making the out in front of Votto.