Not mentioned yet is the “little” detail of Venus’s atmosphere being over 90 times the pressure (and therefore density and mass) of Earths current atmosphere.

Earth hasn’t had an atmosphere like Venus’s for over 2 billion years.

However, Earth’s atmosphere has had CO2 levels about ten-fold higher within the last 50 million years. No greenhouse runaway resulting in an extinction event, the average global temperature was only about ten degrees Centigrade higher.