I'm not sure exactly what you're after, but what about Wikipedia?

Easy to go down a rabbit whole reading on lots of interesting topics.

I'm not pretending to be any expert here, just armchair opinions of ways that we could maybe make these types of events more sustainable and bring more benefits to the host.

I'm just thinking why'd we need a huge stadium to run around in a circle, but truthfully I'm sure it's very complex.

Yeah, I guess I meant more geographical diverse. They were going regional but still in similar areas anda lot of the cost came from infrastructure to handle large numbers of people, but individual, dispersed towns I assume could more easily handle smaller influxes.

You're not wrong, maybe they should look to distribute the games in the future, no need for it all your be in one place.

Give smaller places opportunities to host events where they would have less need for investment and see more returns.

Sometimes there is more important things to spend billions of dollars on.