I dislike the framing of climate tipping points, but it's good to keep in mind that there are components of the climate system that react nonlinearly to warming and will exacerbate climate change. We don't know the timing, but we know the only way to prevent disaster is to stop burning fossil fuels.
@davidho
You said: “…but we know the only way to prevent disaster is to stop burning fossil fuels” & that “Agriculture is a tiny % of emissions and so getting all that to zero will have almost no effect.”!
I guess that means that https://eatforum.org/eat-lancet-commission/ , https://ourworldindata.org/food-emissions-carbon-budget , https://climatehealers.org/blog/an-amazing-update-on-the-climate-healers-position-paper/ and https://www.unep.org/resources/emissions-gap-report-2022 lied when they all claimed that GHG emissions from food alone could use up all of our budget.
No wonder people think that there is nothing that they can do.