@Dj0rel
1. You’re definitely right about that. It’s not like he has some magical book - a strategy guide, say - which can tell him anything about any particular individual, from their food preferences to (presumably) their rape tendencies.
2. He was right by the hero’s team when he fell into the trap, landing in what we can presume is only a few floors below. The heroes, going from where the MC was just located, went to the demon lord and fought for several minutes, until the demon lord noticed the MC. The man has a flight skill, so saying that he wouldn’t be able to match the pace of an out leveled team sort of rocks my suspension of disbelief.