you make a good point OP but the question is how to get out of that situation right?
every time a group debuts obviously they want to hit it big and succeed but as we all know sometimes it's just not possible not matter the song or the amount of money thrown at them...
I mean for the big 3/4 they can debut with a "less than ideal song" (aka o.o) and still sell hotcakes whereas for a mid-tier or (even worse) nugu group - unless your song or a member goes viral or something there's almost no chance of making it big