Bob, as a Spider-man fan of 20 years (Yeah, since I was 4) allow to me say this: You are 98% wrong in the grand scheme of things as far as this movie goes--namely in comparison to the first trilogy. First, Peter has diarrhea of the mouth. If he were in the suit or not, that never changed. In the first trilogy, Peter's personality was bland--based off of the first 60 issues of the comics. He barely spoke, he rarely said what he was thinking or expressed himself. Which doesn't quite work in a movie very well.
The Amazing Spider-Man's Peter was as he is after that point. He can speak his mind--while he tends to be shy, he is -extremely- awkward, and unlike the trilogy, they've actually expressed the fact that he has intelligence and is adept at science. All of which is what Andrew Garfield pulled off without a problem.
Also you say that things are all "JUst so happens" do you? And that this super secret origin story is not your cup of tea? Then why are you a Spider-man fan or even a Marvel fan? ALL marvel does is show how everyone is involved or connected to the next person. No seriously:
Wolverine (James Howlett/ Logan) Served in numerous wars as a Canadian soldier. Here he met Steve Rogers (Captain America), Bucky Barnes (Winter Soldier), Nick Fury, and Dum Dum Dugan in north Africa. Captain America-- while in north Africa teamed up with Namor, Nick Fury, Dum Dum Dugan, Bucky, the first Human Torch, and Union Jack and fought against the Red Skulls elite warriors who were attempting to mine Vibranium, when Namor crossed paths with The Black Panther (Tachala's father) and attacked him four times--each time having dust blown on him that dehydrated him, hilariously.
The Black Panther at the time aided Captain America, yet immediately asking them to leave his lands to him and his people. As sooner or later an American presence of super powered beings will sooner or later cause a rift in stances and a power play for control of land, those with powers, and issues of the sort. (Oddly, this was him calling Civil War happening a good 60 years before the majority of them were even born.)
In one of Captain America's missions with Bucky, they were called to free Jewish prisoners of the SS soldiers. One of the children Captain America and Bucky recused was Max Eisenhardt. Otherwise known as Magneto who was minutes away from being put in a gas chamber. Captain America once met with Howard Stark (Tony Starks father) who was partners with Nathaniel Richards (Reed Richards father) in the "Brotherhood of the Shield." Howard Stark was also one of the first humans to come into contact with Utau (The watcher.)
Captain America (Steve Rogers) had constantly missed the presence of the first Captain America. An African American male named Isaiah Bradely. Said experiment that created his powers were later revamped and used on Luke Cage to make him Power Man. After Captain America fell into ice waters, years later an eskimo tribe found his body encased in ice and began to worship him as a god. Namor discovered this and proceeded to lift the iced Captain America and throw him hundreds of yards away to keep Steve hidden.
Years later, Richard and Mary Parker left Peter in care of his Uncle Ben in order to finish their last mission. They were undercover spies, investigating the resurrection of Hydra after the infinity formula that Nick Fury discovered and took was found. During their mission, it was revealed that the Red Skull simply didn't just have imposters running around -as- him, but he was around again. Once he found out their status, he killed them both, leaving Peter Parker without his mother and father.
At one point of his life, Peter was taken to the circus as a young age by his Uncle Ben and witnessed impressive marksmanship with a bow and arrow he'd seen at the time. By Trickshot, who train Clint Barton--- (Hawkeye) how to shoot. Peter merely passed by Clint at the circus.
"Just so happened?" Bob, you'd have to not know MUCH of marvel past snips of huge digestive stories if you think this is new to anything based off a Marvel comic. I could go on longer about that detail but this took longer than I wanted.
Also, side note: Thor took an ACTIVE part in World War II. On the side of Hitler and almost killed Union Jack. Yeah... right... "just so happens"
Edit: Oh. And Cap trained The Punisher when he enlished in the Marine Corps.