Imagine this conversation:
"What did you do today?"
"I went to the Prefontaine Classic."
"What's that?"
"A professional track meet."
"Oh, okay. How was it?"
"It was great!"
"Cool. Who won?"
Here is one of our problems. We have about 20 different winners in every meet, without any overall victor. And before you start jumping up and down about teams, picture this:
"What did you do today?"
"I went to the USC/UCLA duel meet."
"What's that?"
"It's the traditional end of the regular season where USC and UCLA's track teams face off against each other."
"Oh, okay. How was it?"
"Great! Bryshom Nellum set a PAC-12 record int he 400m!"
"Oh, good. So USC won?"
"Well, actually UCLA won?"
"How's that? You just said that the USC kid set a record. How didn't they win?"
Track and field is absolutely an individual sport. We have collections of individuals in schools or clubs, but they're completely unnecessary to be successful in the sport (see Mary Cain). Usain Bolt can fill up an arena alone, while I've never heard of a venue being filled to watch Messi kick the ball around by himself.
People that advocate the team concept for professional track and field haven't really carried it through in their heads. Here are all the reasons why it won't work. First is money. You need lots and lots of money (which the major team sports get from tv contracts) because your kicking out 90% of the shoe company money currently in the sport since you're asking Yohan Blake to trade in his adidas uniform for the Jacksonville Jets uniform and whatever design it has, so Blake is no longer the walking billboard for adidas he once was.
Then you have to decide how people get paid since there's no more prize money, right? LeBron James's income from the Heat doesn't depend on whether they win or lose tonight. He's on a team, with a salary. Pros in team sports want to perform well not to get money that day, but to put them in a better position for their next contract (and to avoid getting cut). Suddenly, your jumpers are much more valuable than someone like Kirani James, right? Christian Taylor can get you points in the Long Jump and the Triple Jump, but James is only good for one event, really.
And forget about developing American distance runners. If I want my team to win, and I'm the team owner, I have chartered flights from East Africa to my training camp bringing in ready made winners, from 800m on up.
Also, you would do well to cancel the World Championships and pull track out of the Olympics. As long as those are the most important meets of the year, everything else will still be expendable. Athletes sit this or that meet out because EVERYTHING is just preparations for Worlds or the Olympics. That's all the matters. If you want your team to count for anything, the team title must be the most important goal. You can talk about FIFA and the Euro Cup, but the difference there of course is that you're selling nationalities and England is still playing without whatever player who might be injured. In our world, there are meets with Usain Bolt and then there's every other meet.
And who's coaching these teams? How many top triple jump coaches are there in the world? What's your plan if Kirani James is languishing under Harvey Glance and says he needs Clyde Hart to turn him into a champion?
No, the team model isn't one for track and field. It was there in the US during the Cold War, when it was the free world vs. the communists, but those days have gone. American sports fans will be much more concerned and aware of the NBA Finals than the FIBA Championships. Unlike the rest of the world, international sport doesn't mean much. The USA could lose to Argentina in basketball (as it has) and it won't make waves like Miami losing to San Antonio.
Look at individual sports like golf and tennis. Those are more applicable to track and field. They have an easier ride, because you're talking about a few dozen athletes all competing in and for the same thing, instead of hundreds of athletes in over a dozen different disciplines. It's tough. How many people do you know that competed in track in school but now couldn't tell you hardly anything about what's going on in this world? All the participation there is in track doesn't translate into huge fan bases (it's easier to be interested in your own performances or those of your friends than in a stranger's, no matter how good it is).
There's no easy answer.