You don't, but look at the frame data. Ike's bair has about as much, if not more, lag as DDD's. Also, DDD's bair is pretty safe if spaced while rising. Like, SH bair OoS. If it's done immediately while rising and jumping away, it's extremely hard to punish it. Attempts usually end up with you being baired again in the face.
Edit: And to kinda account for my 'skill,' I play with John12346 all the time. Most of the games are really close, and I've beaten him a few times, including on his famed, preferred CP (Frigate) that he claims he's nigh unbeatable on.
Edit2: And I've gotten some placings at a couple tournaments with other good players in them.