But doesn’t this mean that geoengineering is also effective at giving us extra time? We’d start using safer gases that have the same cooling effect while we try and go carbon negative worldwide

Personally, I think that'd actually have an overall negative effect. Governments and corporations desperately don't want to do anything about climate change, and giving them more time with cooler temperatures will (my opinion) just allow the world to further delay doing anything about it, allowing them to bake in even worse temps if they ever had to stop geoengineering for whatever reason.

This is a really morbid take, but all these big heatwaves, radical weather, and rise in weather related deaths cannot be ignored, and that's unfortunately damn useful. It makes it harder to be a climate denier/skeptic, makes people more angry when nothing is being done about curbing emissions (hopefully leading to more climate protests), and really forces society to place a skeptical eye at all the new fossil fuels being brought online around the world, all because they can personally feel it.

If it could be made to be business as usual, I think we'd see the "Gosh darn it guys, we reaaaallly should do something about all this. Eventually." mentality just continue until it once again becomes too hot physically to ignore.