Here is the big reason why. If you are creating an ITO, you are implicitly promising that you will provide tacos to someone in the future.
It is a taco future. You can't just create futures, even taco futures, without falling under regulations.
THAT is the problem with ICOs. Look, if you just want to sell a cryptocurrency, that has ALREADY been created, you won't run into any issues with the law. There is nothing illegal about premining, and selling a crytocurrency.
The problem is when you say "This cyptocurrency represents stake in something that doesn't exist yet, but I totally promise that it will exist in the future". No. Thats a future. Thats a security. If it doesn't exist yet, you can't sell it without falling under security laws.
