I’ll be starting a player on BYE this week because I do not want to drop anyone on my bench in what is a meaningless game for me. My opponent is out of the playoffs too which factors into my decision. If my opponent was vying for a playoff spot or if our game could impact others I would reconsider.
In my case, my opponent already has a top 3 seed locked up. If I throw the game, he would actually have an increased chance at the top seed.
Then don't throw the game. It's not right for the rest of the league.
If an NFL team has the #1 seed locked up, they sit their starters (no it's not "throwing the game" but they're giving themselves a very low win probability to increase their likelihood of success in the playoffs -- very similar). What if that team's opponent is in a fight for a playoff spot? Should the #1 seed play their starters?
Not the same thing in any way, shape, or form. NFL teams sit players due to injury concerns and physical toll on players. That is not a concern for FF. If the NFL had no risk of injury they would not sit players in that situation.
And they're worried about injuries because .....
I have no idea where you are going with this.
FF and NFL are not the same thing. Throwing games in the NFL would not be tolerated at all. One big difference in NFL teams sitting players vs FF managers sitting players is the NFL teams have a player that will actually play. In FF playing a guy on bye or that is inactive to throw a game gives you a zero. There is not chance of scoring. Not at all close to the same thing.
Nothing else matters for fantasy after the two reasons I gave. Nothing.
The two reasons you gave apply exactly 100% the same in the NFL.
"first, allowing this can help or hurt other teams trying to make the playoffs."
Same with sitting starters in NFL? Yes
"Second, allowing this can help or hurt other teams draft position"
Same with sitting starters in NFL? Yes