Glow said it perfectly. Even a lot of the top jumpers have done shady shit, who's to say even they wouldn't abuse it?
It maybe be identifiable, zig, but it takes a lot of time and you have to look at every run carefully. Nobody wants to do that..
Someone also said if a newbie jumper gets really good, they would probably be TAS'ing (assuming we allowed TAS to the public). What about the "newbie" jumpers who get good? We can't assume every jumper who isn't top-of-the-line won't become a top-of-the-line jumper in the future and if they do it's because of TAS. Sure, it has a lot of positive side effects, but the negative outweighs the positive by a large amount.
The only thing I really see it doing any good is showcasing maps. Yeah you can argue that showing nearly impossible shit is also cool, but that defeats the purpose of being an actual "good" jumper. Sure that's cool, but it should only be in the hands of those trustworthy, and like I said that is a VERY small group of people in this community.
Go ahead and keep arguing about the positive side of TAS, but we all know why some of you really want it, and we all know it wouldn't be good for the community.