Sure, but it's not that lucky. You can't set your house on fire by adding more and more roof insulation, it's the same here. The greenhouse effect saturates, it's not linear https://www.scirp.org/pdf/acs2024144_44701276.pdf There's also lots of feedback loops. CO2 levels were much higher in the past but life thrived, it wasn't waterworld, it was just a lot greener. So it only sounds lucky because climatologists have claimed even very tiny changes can cause a crisis.
Remember, we're talking here about a gas that makes up 0.04% of the atmosphere. Water is a much more powerful greenhouse gas. CO2 wasn't measured directly before about 1960, but if you believe the ice core measurements it was about 0.02% in 1850. It would be a very fragile planet that could be tipped into disaster by a change of 0.02 percentage points in the level of a single gas.
There was the Permian–Triassic extinction event, the "great dying", where apparently the only large land animals to survive were the therocephalians and their prey lystrosaurus, and for both their survival seems to be due to burrowing. CO2 had hit 0.25%.
Remember, we're talking here about a gas that makes up 0.04% of the atmosphere. Water is a much more powerful greenhouse gas. CO2 wasn't measured directly before about 1960, but if you believe the ice core measurements it was about 0.02% in 1850. It would be a very fragile planet that could be tipped into disaster by a change of 0.02 percentage points in the level of a single gas.