It sounds like you're playing with the intent to push your limits. Assuming that everyone is playing with that goal in mind is a big mistake. Many of us are playing to relax at the end of a long workday, not to push our limits. A comfortable run is a relaxing one. I know that there are guilds who share a common goal of constantly pushing their limits, and that's perfectly fine. More power to them and to you. In duty roulette, though, you need to realize that you're going to be playing with a wide variety of players.

As far as "teaching" and "coddling," I don't think it's the game's place to "teach" players to experiment. I think it's great that the game enables players who want to experiment in their own groups, but I don't want it forced on anyone. When I see your posts, I'm reading, "Everyone needs to be taught to play my way, and I'm frustrated that the game isn't forcing everyone to do so." It's kind of ironic for you to critically use the phrase, "coddled like children," when describing a game that's rated T for teen. You're playing a kid's game. I don't know what more you're expecting out of it.