I see your point, and acknowledge the truth in it.. I would like to share my feelings though if I may. This will be long winded and you probably won't agree, so feel free to skip it..
I suppose I should start with this note. I was raised mostly through the special education system.. And my experiences there slant my perspective of things. I wasn't "slow".. quite the contrary.. but I was..what the school administrators called.. "A distraction"..so.. Heavily medicated, and in the bin with the other "distractions" I went. Most of my friends as a child were challenged in some way or another, a few of my friends had to use chairs, or were unable to speak, this never clicked as something that should bother me because I didn't know any different.
So.. this is my perspective.. I prefer the term "challenged".. This isn't a pc thing.. I think it is better to refer to people with impairments as challenged because it has a motivational force..A challenge, something to push aside, climb over, or force your way through.. a hurdle, an obstacle, a test.. A challenge to rise above your limitations and succeed anyway. Because we all have limitations, just not all of them are sitting right there on the surface. There are no limitations on human potential, only excuses. A person must define, and defy their challenges, not let them selves be defined by them. <And some other Hallmark sentiments. Sorry, had to take a moment to laugh at my self.>
<If we have to talk about PC though.. Disabled or Handicapped are considered acceptable for people with physical challenges..or I believe this to be the case. How ever there is a word that tends to only pop up around people with "mental challenges".. and you hear it a lot around special education environments... and that's the word. "Special"..... It would take me too long to explain it, but this is the single most offensive thing I can imagine calling someone who is mentally challenged. I can elaborate if you like, but this post is way too long as it is>
Anyway, that was to get me here.. The reason why it would be important to see Scootaloo fly is metaphorical. Flight is synonymous with triumph,success, victory, what ever words have you.. Yes, they can illustrate the CMCs getting their cutie marks. But as it applies to Scootaloo, flight would be a symbol of triumph over her limitations. If she doesn't fly, then there needs to be an acknowledgement on her part that she is the way she is, and that she is not going to be ashamed of it, which the show has implied to be the case...that she is ashamed of it, and afraid of others finding out.
In 10 to 15 years time, many physical impairments, disabilities, challenges, or what ever you like, will not exist. Scientists are already growing spinal neuro-tissue in labs, as well as a host of other tissues and are already working on complicated structures like organs.. Mechanical prosthesis, such as functioning neuro-operative eyes, limbs, body frames.. some of these things we have now.. though only the very earliest models..With in this generation, if we can manage to keep from destroying our selves, things like physical disability will be a thing of the past. I truly believe this. I can only hope the day comes where more cruel challenges may be cured so easily..
<In all honesty I don't feel like posting this any more, but it took me so long to write it I feel obligated x.x>