I would like to point out a few things in real life that show that that's NOT necessarily a good thing. Had he hesitated and considered other options he might have been too late and Gwen would have died any way. He really had no way of knowing that the forces would of the recoil would have killed Gwen (I have also mentioned this before on numerous occasions.) You don't always have time to do a cost/benefit analysis! You act instinctively and either works or it doesn't, that's life. His perceived guilt is unjustified. You make the best decision you can given the information you have at that time. Right or wrong, success or failure, he made a GOOD decision. It just happened to be the wrong decision. He failed not because he was a bad person, or negligent, but because he couldn't defy the laws of physics.
There are a couple of real life situations that I would like to reference for you to research regarding being damned if you do damned if you don't. I would appreciate YOU doing the research yourself because it would take forever for me to explain them: First Gen. Short's decisions regarding positioning of planes at Pearl Harbor and the inward opening hatch on Apollo 1.
Anyway, bringing Gwen back and them being a couple is important to me and other people as well. I'm not alone in this desire. You may not appreciate the karmic balance that I talk about yet, but there WILL come a time in your life where you will experience this desire for justice. Hell, even back with Ben's death, there was a certain amount of karmic balance. Ben died but his killer WAS brought to justice. Peter has saved millions of peoples lives since he became Spider-man, but he still won't give himself a break.
Given when you started reading you may not appreciate Gwen and Peter getting the chance to be the couple they were supposed to. Again it is important to me, and whether you agree I would appreciate you at least respecting my point of view. As for Gwen coming back being a one time thing, IF it's done the way I want it to, it would be enough, for me. I don't know exactly why you are resistant to Gwen coming back other than it disrupts your status quo. For some people their status quo was Peter and MJ married so OMD upset their world. Hell, for some people, if they started reading at the beginning of SpOck. Having Peter back might upset THEM!!
I get the impression that some people , not necessarily you, but SOME others, just want Peter miserable. My guess is their lives are sad and they want to feel like they are not alone, and Peter's misery gives them comfort. Me, I have a desire for hope. That although bad things happen, good things also happen. I like to hold on to the belief that there is a certain degree of fairness in the world and that we can at the very least find that karmic balance in some way or another.
Well, I said my piece, I have little faith that you will appreciate or respect my position, but I hope that someday you will. If you do, hopefully, it might spare you some pain in YOUR life.