That just means that the right conditions were a worldwide (or close to worldwide) phenomenon on Earth. This does not imply that the right conditions for the development of civilisation are necessarily common given the right conditions for the formation of intelligent life.
Unfortunately, we only have one example of a planet having the right conditions for the formation of intelligent life. Drawing statistical inferences from a single example is not a good idea.
That just means that the right conditions were a worldwide (or close to worldwide) phenomenon on Earth. This does not imply that the right conditions for the development of civilisation are necessarily common given the right conditions for the formation of intelligent life.
Unfortunately, we only have one example of a planet having the right conditions for the formation of intelligent life. Drawing statistical inferences from a single example is not a good idea.