Maybe this is overly wishful thinking, but I do think there is enough data analysis on how people vote that it could be real: if a large body of people with a history of voting blue vote in this election and vote blue down the ballot but omit the president, or have a third party for the president instead, then that might actually send a message to the Democrats that they are fucking up their candidate selection badly, and make them at least marginally more likely to cater to the left when choosing candidates in the future.

That said I am not sure I can condone this tactic in good faith in this particular election given the alternative, but part of me feels like the right will perpetually have more and more abhorrent alternatives and there needs to be a line somewhere, and if it's not at genocide then I honestly don't know where it is.

No matter how you look at it all the options are bad. At least Tim being slightly left of Kamala shows Democrats slightly more willing to negotiate with disenfranchised left voters than chasing nebulous farther right independents. Not left enough to condemn genocide though so a very minor distinction