Let me weigh in with a quote from GM David Bronstein:
"It is more dangerous for Black to play the King's Indian than it is for White to play King's Gambit."
I trust Bronstein's judgement here. Nobody says that the KID is a poor choice of opening, so to me, KG is an acceptable line. The Qh4+ defense by Black is just another way of playing the Black pieces here, and it is neither weak nor stupid. I think that there are better lines for Black in the KG, but this could be a game-time decision by Black, counting on (hoping on?) White's inability to find the right line. And while moving the Q several times in the opening is not regarded as "proper play," I am reminded of another quote, this time by Alekhine. When Alekhine won a game in which he moved his Q 6(!) times in the first 12 moves, an amatuer ssaid to him, "But Grandmaster, the books say that that is bad chess." To which Alekhine replied, "The books say?!? I write the books!" Moral of the story--GMs do what works for them; you should do what works for you.
There's nothing wrong with playing sound openings though. I like the Benoni and King's Indian and they are basically sound and have a sharp/ fun game. Also I just like the subtle ideas of the QG because you can turn one small advantage eventually into a large enough one to win. I just wouldn't like having to hope someone doesn't play well just for the game to be insane and give me good chances.You act as if there's something wrong with playing a sound opening. I win with these openings because you have nothing to lose and enough to gain. I would prefer to use openings like the king's gambit for less serious games and to improve my tactics but the game would not be taken so seriously as I'm not comfortable in those positions and therefore it would not reflect my true playing strength.
So your play in positions which you are not comfortable playing does not indicate you playing strength?
I would say the opposite