A conditional plus 어쩌다, what to do about it. Six of these eight lines use the fixed shape meaning it nearly went the other way, looking back at a near miss with relief: imagine if he had never been made a singer, imagine if we had not had him, thank goodness we packed the hot dogs, what if I had never come. The remaining direction is a warning about a risk still ahead, as in what if you get hurt.
Register: casual, exclamatory; frequent in captions