When ABC had the Olympics decades ago they devoted lots of time to field events. Likewise the decathlon. Bruce Jenner never would have become as famous today. Once NBC took over they mostly followed the ABC formula in '88 but then steadily shifted away, unless there was a huge storyline like Powell/Lewis.
Now it's absolutely disgusting. Last year in Rio I had no idea how compelling some of the field events had been until watching the full video on NBC's website.
BBC does a far superior job, as others have mentioned. Olympic Channel shows a 4 hour taped version of the BBC evening session every night during these world championships. I watch the NBCSN version live in the afternoon and then the BBC tape later. The major difference is extra focus on field events, plus obviously a different perspective on the races.
I don't mind the networks cutting away to field events but it burns me to no description when they shift away from a distance race with seemingly no idea that it's a pivotal point in the race. For example, last year in Rio I had a big wager on Ayana to sweep the 10,000 and 5000. I bet it much earlier at very favorable comparative odds. NBC during the 5000 seemed to think Ayana's win was a mere formality as she surged to a big lead. They started showing some ridiculous canned segment on somebody else. Meanwhile I was concerned because Ayana had taken it out too rapidly.
Sure enough, when NBC finally came back to the race Craig Masback is saying..."The unthinkable has happened." Ayana's lead was gone and soon she was devoured.
I wanted to punch everybody in the NBC sports department. At least allow me to watch my money slipping away.