For example, I'm using Debian, and I think we could learn a thing or two from Mint about how to make it "friendlier" for new users. I often see Mint recommended to new users, but rarely Debian, which has a goal to be "the universal operating system".
I also think we could learn website design from.. looks at notes ..everyone else.
Would it detract from Debian if it had an installer which was more intuitive to new users? As long as they don't remove the options to configure, I see no harm, only benefits. To me, the thing about Debian is that it's a community. If a distro wants to be elitistic, sure, that's up to them, but I don't see Debian having that goal.