Raging? Really? How about we not do that, please and thank you.
No one said it, no; it was definitely an implication hanging heavily in the air, and I responded to said implication by making a statement that I felt was relevant to the conversation.
GMing is a creative skill, like roleplaying or painting or writing stories or making towering sculptures out of popsicle sticks or makeup or entertaining people on a stream. It's not the same skill as roleplaying, it's a different skill, and not everybody has the capacity to learn it just like the way my hands works means I will never be able to paint in a particular fashion. Being entertaining as part of an unscripted group versus entertaining people somehow under your guidance -- they're different muscles.
I think it's a great idea to encourage people to do it, bribe them, make it worthwhile, find ways to motivate more people to find out if they have the skill, but don't do it with an air that's going to make the people who can't do it feel unwelcome. That's all I'm trying to say.