Congratulations!
You're starting to think like an astronomer!
"...the reason behind why we are missing certain pieces of data may be more meaningful than the data we have."
Its that ole debbil in disguise, the 'selection effect'. In a purely observational science, where experiment plays no role, the nature of the data is inherently biased. You'll ALWAYS be looking for your lost car keys near the streetlights, 'cuz out in the dark you can't see them at all.