Laughsalot was not a true knight. That is to say, he had only relied on his talent, skill, and high stats to reach the level that he was in. He did not go through rigorous training, life and death battles to push his body.
As such, he was unaware of the real strength of a True Knight who did not simply rely on his stats and talent, but trained their physical body to the limit of transcendence.
The food he drugged wouldn't have much effect on her body, which was able to reach level 8. Much less needs to be said now that Reinhardt has even used the [Radiant Renewal] on them, removing all harmful condiments from their body.
It was a pipe dream of Laughsalot if he thought that Zerina would come looking for him to satisfy her desire.
"No, I need to wait patiently. Maybe it is taking time to kick in." And so, like a donkey trying to reach for the carrot dangling right before it, he couldn't let the woman he was infatuated with go.
