The part about voting is pretty simple logic.
In a voting system where the one who gets majority of the votes wins, the other votes don’t really have an impact. Of course they are part of the race to win, but outside of that, what do the other votes do? Nothing. In other systems those votes would cause a second round to happen, but in the US system they don’t. Those votes are just… gone.
Sure, you could argue that it’s about “sending a message”, but… why? Why do this now while the Project 2025 looms over the US if the Republicans win? The Democratic Party won’t change before the elections and no amount of threatening to vote for 3rd party will change that.
The part about “if you don’t vote for Biden, you vote for Trump” is not literal. It’s more… abstract if that makes sense. Since if you vote for parties that have no realistic chance of winning, it means that a party that has a chance of winning doesn’t get that vote and the party you least want in power is one vote closer to win the election. This logic goes for both Democrats and Republicans. If a Republican votes for third party that has no chance of winning, their vote metaphorically goes to the Democratic party, since the Republican party will be one vote further away from the Democratic party. Hell, this same logic, to some extent, also applies to other systems, but not as much as the US system.
So unless you are predicting Jill Stein to be making history and winning as a third party, a thing that hasn’t happened, that vote won’t affect the elections and the party you least want in power is just one vote closer to be winning.
In a two round system, your vote would matter more, since your vote would be affecting everyone’s chance of getting an absolute majority of 50% all votes. And since everyone, but your chosen party, is one vote further from the 50% mark, a second round has a higher chance of happening.
I saw the video about Python from Life Of Boris and thought it looked fun, so I just decided to learn programming.