I just don't see where "comfort" comes into it, unless it refers to people wanting to release proprietary modified versions or extensions. If that's the case, "please change your license, because I would like to distribute proprietary derivations of your software" is a different argument than "Please change your license, because I do not feel comfortable modifying GPL code". The latter makes it sound like GPL code has copyleft cooties that jump out of the code and onto developers.