Well I think nobody wants any trouble. If your project is good and ICO can reach hard cap without any trouble why would risk yourself and the company by involving in unnecessary legal troubles. I think the rewards are less to compensate the risks they have to take.
This guy is correct. It is not about discrimination or laziness of the team behind the project. It is about weighing in which is more risk-free. Going through all the trouble dealing with legal matters is tiresome and even costs lots of bucks. If the sec did not prohibit US citizens to participate on any ICOs. I am 100% those who ran ICOs would be glad to welcome them in.