If that's what we're meaning when we talk about "tipping points", yes, they exist. But as you yourself said, "We don’t necessarily understand exactly how close we are." The idea that passing some arbitrary line like "1.5 degrees" is a point of no return is unscientific nonsense, and that's what the vast majority of people mean when they say "tipping points."

And the point is, none of that changes the need to keep working towards improvement. Every fraction of a degree less the planet heats will make a difference. Even as monumental climate changes occur, those changes can be lessened, their impact reduced, by any amount that we decarbonise the atmosphere.

If you're under the impression that I'm arguing against climate change being real in any way shape or form, or that I'm arguing against it being utterly catastrophic, you've missed my point so badly that you might as well be reading it in a different language. My point is very, very simple; there is never a point where we get to give up.

No matter what happens, every effort to reduce the damage to our climate will save lives. Things can always be worse, and because things can always be worse it ontologically follows that things can always be better, even when the definition of "better' is "fewer people die."

The fight isn't lost or won. Get those concepts out of your mind. Suzuki - as brilliant as he may be - is an idiot for invoking them like this. He's speaking about a very limited, very specific piece of the fight, but he should have understood that the public would take his words entirely out of context. The people who want to poison and destroy our planet for profit are, right now, actively pushing the propaganda that the battle against climate change is over. They are wrong, and they are lying. The battle against climate change is a battle to reduce harm, and you can always reduce harm, now matter how great the scale of the eventual harm may be.

The comforting fantasy is the idea that we can throw up our hands and say "We lost."

Losing is easy. It demands nothing from us. Losing has no call to action. If we've lost, then there's no fight left to be fought.

The reality is that the fight is always worth fighting. And that sucks, because it means we never get to give up. We never get to say "It's over", and stop caring. Caring is a lot harder.

In not an appropriate analogy. We are not just the people in the car, we are the whole neighborhood.

Even if the people in the car cannot prevent a crash by braking, they can still prevent further damage to people and property by braking as much as possible while within their means.