There is no such thing as a Fiduciary. Other countries that say they have Fiduciary are lying. There is no such thing. What they mean to say is the regulators will decide what you sell, period. But, as a client, and it is my money, I don't want to manage the money the way regulators tell me too. I want to manage it the way I and my advisor want to. If trailers are the way I want, I should get Trailers. If I don't want Trailer fees , I should get that.
The way it is now, the rules are already there. Have trailers if you want and if you don't , don't buy funds with Trailers.