Honestly given current technology, it makes the most sense to care for the Earth than attempt to colonize other planets, which are fundamentally unlivable in a myriad of ways. Survival of our species doesn’t mean a whole lot if it is 8 guys in a Mars base dependent on regular supply missions from Earth.
Not to mention, if we do focus on our planet and how to best manage the environment, it teaches lessons on how to potentially manage other planets’ one day.
Yeah, the Starship was severely over-promised from the start, especially the payload capacity. I wish there had been more required demonstrations from the beginning, instead of just using the numbers promised by Musk, who is known to inflate numbers for marketing purposes.
Not to mention the assumption of orbital fuelling working perfectly without even doing any demonstrations at all or pointing to any existing technologies. It’s a very Kerbal Space Program idea but significantly more complex in reality. Especially as now they are planning 5+ refuelling missions per Starship going to the Moon, which is logistically baffling.
The context for that number specifically is this Kurzgesagt video, which suggests that calendars should set their year zero to 12 000 BCE, when human civilization first began.