^^But that's exactly what I'm talking about, making a bet with someone based on the knowledge available, i.e., that 2 teams who did not have 2 of the highest initial odds nonetheless remain 2 of the 3 remaining teams.
Another situation (to use Botterill's favorite phrase) was that after 3 balls were drawn, Chicago, and not Buffalo, had the highest odds to match the 4th ball. That one is likely easier for people to understand. But again, in real life, unscrupulous people can make money off people who don't.
In the Monte Hall problem, people generally don't understand both the magnitude of the shift in odds in their favor by switching their choice away from their initial one, as well as the change in difference in odds between the remaining choices (3 choices initially, 2 choices eventually).
In the 2018 draft scenario, once the "new knowledge" was available regarding which teams weren't in the final 3 teams, the magnitude of the odds of the remaining teams, and the differences in odds between the remaining teams change significantly relative to the magnitude and differences between the 15 original teams.
Same with card draws in poker. (I don't play poker.) Odds of drawing card / suit "X" change relative to how many cards have already been dealt, what cards / suit matching "X" are already known, etc.
Same with blackjack. (I like blackjack, but have a hard time finding $5 tables anymore on the Vegas strip.) Odds of drawing card "X" or card "<Y" change depending on how many decks are in a shoe, how many cards have been dealt, what of those have been revealed, etc.
Not arguing. Just saying the original odds are the original odds, based on original information. The new odds are equally true and valid, based on the subsequent / new knowledge.
I agree with the real-life silly comment, but, e.g., that changes in poker / blackjack once a hand / shoe has progressed.