Its how Scoots life is handled in the show aswell as her friend lives that really had caused the small ''Scootaloo is a orphan'' thing to go from a little thing agreed upon by afew people to a hugely agreed upon fact in the fandom really is the thing as look at the eps that was around during your comment,both her closest friends we see families and authority figures regularly of theirs and then we have Scootaloo being very desperate for a Big Sister mentor like Rainbow Dash even then, Plus you add the fact its rather heavily hinted at Applejacks parents are dead in the cartoon and we atleast see Sweeties parents in the series so its bound to cause people to think and have theories aswell as suspicion. Now before you try to go and say something about that house scene in the series that's not proof she isn't a orphan but its not proof she is one either as well you know foster families exist in the real world so Equestia are bound to have such a thing aswell in that world yet it could be her parents home biological or otherwise.



Now in present year matter is this from the current season I think it was called'' Parental Glideance '' their is a lot more fuel to the Scootaloo is a orphan theory given the lines Scootaloo had towards Rainbow over when Rainbow was showing her displeasure over how super over the top those two are. Well that theory and what I see as a even darker/worse theory I could tell you people have on Scoots parent status.



Also in Equestria atleast the main 6 and others of their status are adults so its reasonable to believe the parents are in another location as in not in the same location the adults are at that or they died sometime do to age related matters,yet someone in that world like Scootaloo acting the way she does in regards to Rainbow Dash among afew other things yeah I believe you get what I mean