A few additional thoughts/observations:
1) In regards to trigger weight, I think people tend to often skew their opinions heavily based on what they are already used to (which these days, is more and more likely to be a light striker trigger) and what they are accurate with at the range, under controlled (and often static) circumstances, often with slow, controlled trigger pulls. That may be a great way to gauge the accuracy of the pistol itself, and to work on your technique, but that isn't necessarily the best way to gauge your accuracy with that pistol under stress in a rapidly changing situation. And I highly doubt that in a real situation, a few pounds difference in trigger is even going to be noticeable. Don't confuse range results with the real world.
As I mentioned above, if typical DA pistol weights are truly a factor in the increased chance of collateral damage, then this would be true with revolvers as well (which have similar trigger weights), and as such, we would have a significant body of evidence to support this from the decades of data collected when revolvers were the dominant handgun. Also, we should see a corresponding decrease in the amount of missed shots and collateral damage with the move by agencies to striker fired pistols. To the best of my knowledge, there is no data to support this theory.
2) I think it's just as easy to make the argument that in a high-stress situation, one is likely to pull a light trigger prematurely, leading to an inaccurate shot. You can construct logic to bolster either perspective, but at the end of the day, I don't think it's really about trigger weight at all - it's about what you train with.
3) While accuracy is obviously very important, so is safety. I have no desire for a manual safety on my guns. At the same time, I know I'm not perfect and can make mistakes. For this reason, I like having a heavier first trigger pull and particularly because I often carry AIWB, I like being able to keep a thumb on the hammer when holstering. These factors, to me, are just as important as the training required to "master" the DA trigger transition, which in general I think some people make a way bigger deal about than it actually is in reality.
As a sidenote, I find it fascinating that people were obviously very capable of being accurate with DA/SA pistols and revolvers for many years, with average DA trigger weights of 10-12 lbs, and yet somehow in the modern striker era, suddenly being accurate with anything more than a 4lb trigger is viewed as next to impossible...