"You only quoted a PORTION of my post and I can clearly see why. I clearly stated that there are already rides that are not for all ages- even with height restrictions and such.... so why should THIS ride be any different and made for every single age/size/etc? Answer the complete question-
Why should THIS ride be held to the standard of being for every age person in the world yet there are many other rides that are clearly not for every single person in the world?"
Because the public sees a big difference between attractions that might be for a limited audience because of the story or thrills, i.e. children too frightened by the 'Haunted Mansion' or people afraid of heights for 'Tower of Terror', pregnant women not wanting something rough and attractions that cause real pain and genuine discomfort for a substantial percentage of its riders.
I mean, "moving her head out of the restraint to look turned her into a gyroscope" is not the indication of ride for a lot of people. Turning to look at something is a very common human trait and one not normally associated with any kind of danger (not like standing up on a movie vehicle or unbuckling a seat belt or those normal safety precautions on a ride). I heard all the warnings, but I unconsciously turn my head to the side to say something the person next to me (because that's how humans tend to talk and some instincts can't be overcome just because a neon sign mentioned it). Should I have been "punished" with an hour-long head ache from an amusement park ride?
I now expect a flurry of bouncing smiley face posts that say "yes", and that's my point. WDW was not built just for your solitary benefit. There are 15,999,999 other people that WDW must please every year to stay in business ("Disney is a business" is more than a justification for the latest cut they make). The goal of 'Mission: Space' is not to let you get your asteroids off, the goal is to attract several million happy people (i.e., wallets) back to Epcot to save it from a rather gruesome fate. The "mistake" is not about whether 'M:S' is too rough for the kiddie and the old farts*, but whether 'M:S' is a ride that will recoup its investment.
There are "rumors" that WDW is seriously concerned about the level of guest unhappiness with 'Mission: Space'. The same thing happened with 'Body Wars' the attraction was juiced at the being because that's "what people wanted" only to find out that the are far more pukers than there are kEwL thrill ride seekers at WDW.
There is no clear rule to follow here. It's a choice about where Disney wants to be on a scale from 'Swan Boats' all the way up to 'Mega Colossal Gargantuan Terror of Plummeting Screaming Death'. Given where Disney's market it, and where they try to sell it, one can make the argument that 'Mission: Space' is an inappropriate ride for Epcot.
But that's not our call to make. The public will make the decision and vote with the feet (and their stomachs). Like movies, the question is how popular will the ride remain over time; Disney built 'M:S' to last twenty years. Will it still be pulling in 'Pirates' size audiences then? Or will it be forgotten and seldom visited 'Body Wars' rarely has the lines it did when it first opened.
So if you enjoyed the ride, please go and enjoy it. But realize that just because others don't doesn't make them less human or worse people than you. And also keep in mind that it's those other people who keep WDW in business, not you.
* - by the way, Walt built the Matterhorn and it had no height restrictions. For those of us growing up in Southern California it was a test of childhood to be "brave" enough to ride the ride. And all these years I've turned my head plenty of times and never puked once.
Come on, people, King Triton was just expressing his opinon. Give him a break. He has the right to say what he thinks like everyone else around here. 
