Lucario doesn't make mistakes. He just doubles down on great ideas!
In a normal game, you wouldn't be doing any selecting right now. TOPHATANT123 would be choosing the next bomb word and Mop it up would be the first to start selecting Safe Words in the next round. Lucario's played enough of these games and it is a pretty simple concept that I'm surprised it is becoming this complicated. But maybe he's trying to do something different.
Frankly, it benefits you and me since this method may keep us safer through the opening rounds and we last longer depending on what he's doing so you may just want to go along with him on this one.