My impression of what she's saying here is, vote for Harris now, but don't wait 4 years to be politically active again so we can try to actually get someone better. Which I completely agree with. Getting Trump elected doesn't help anything and might make some goals less achievable, and right now Harris is the only one who can beat him. But the more important part is to not stop critiquing her ideology. Don't let her forget about Palestinian children, don't let people be complacent with capitalist hegemony, do the ground work necessary to move our government to the left. That doesn't mean waiting four years to try and stop her reelection, it means continuing to talk in real life with people about what we should expect from government. It means trying to build momentum behind some candidates to get them elected in 2 years, and don't wait for election season to do so. This work doesn't stop.

And a brief aside for those that just want a revolution to be done with it. 1, most of the same still applies, especially the building momentum part. And 2, there haven't been any successful revolutions without some connections to those in power, so we'll need to elect some sympathetic candidates before that possibility has any chance.