Here's the difference between the United States and other countries. Firstly, we have 330 million people as well as a competitive university athletic system for xc / track&field. Therefore you have a high number of distance runners finishing school at the age of 22-23 who are really just getting started in the sport, but have shown a level of success and potential. Where does a 22-23 year old 29 minute 10k guy and 34 minute 10k woman go at that point who wants to keep developing to see what they can do at longer distances? What do they shoot for? What is realistic? Hardly anyone is running marathons or even competitive half marathons in college so people have no idea what they can run in those events.
There really is no national development program in the US because USATF has always just relied on the universities to produce national team talent. And because of that there is a large void in progression between people running 1500m -10k races in college and people who have progressed to the point of running international level marathons. And that was basically why the Hanson's entered the picture in the late 90's to try to provide that bridge. The US Trials is unique in that it provides something for most of those people to point towards as the next level past their college career. An example was D2 all-American runner Trent Briney that ran 2:21 to qualify for the 2004 Olympic Trials and then ran 2:12 for 4th place there (not to mention Brian Sell who finished 5th that day after qualifying with a 2:20 and then four years later he made the Olympic Team for 2008). Both of those guys ran for Hanson's.
Sure, people may have different motivations for pursuing a Trials qualifying time and people can argue all day about what those standards should be and why, but the reality is that with the US Olympic Team the qualifying system is supposed to be whoever the top three people are to cross the finish-line on the day make up the team. And due to the nature of the marathon, the development process, etc. there are a lot of people out there that could nail it down on the day and that has been shown over and over and over. And that's why the Olympic Trials exists because it's objective. The alternative is to not have a Trials race and leave the selection of the team up a subjective committee and in the USA that goes against the grain of earning your opportunity.
Keep the subjective politics out of it, set a standard using common sense, apply rules using common sense, when in doubt side with the athlete and give people a bib number and just go compete. No one is getting a free pass who is competing at that level, it's hard work any way you cut it., you can't fake a marathon, you don't get lucky and run far and fast. To grill someone over something controversial like a fraction of a second of their chip / gun time, etc. in a marathon seems pointless unless you have an axe to grind. And to anyone out there that believes every marathon on the planet is exactly 26 miles, 385 yards I hate to disappoint you. Unless you are running it on a 400m flat track then you can't know without a shadow of a doubt how EXACT a course is when it is stretched over city streets for that length. Who knows maybe Krolick actually ran 2:18:50 or maybe be ran 2:19:10 for the exact distance. Either way it was a pretty good run.