Mars, I agree with almost everything you said, (I am also of the "I want my gun to be ready" persuasion) but have one question. Surely, you are not comparing a Glock/XD/M&P to a cocked USP or Beretta, are you? That's not a fair comparison.
Up until about three years ago, I would have completely agreed with your whole post (being a SIG man). However, I decided that I wanted to get away from the two-trigger-pull guns, and that left basically 1911, XD, or Glock. I don't believe in the "I'm only going to need it to shoot someone at three feet, so the heavy first shot doesn't matter." Needless to say, I became comfortable with Glocks.
Of course a heavier trigger will be safer, but I just don't feel that it's necessary for every shooter. Like you, I don't care for manual safeties, but we can't dispute the fact that they make guns safer to re-holster (assuming they are used). I also feel that they are unnecessary (the same way you do). You can make a gun so safe that's it useless.