Hehe I couldn't agree more, on how much Elon might know about space, pretty funny he uses his experience of what is only a few years of reusing old rocket technology, launching sport cars, shrapnel, and fireworks into space, to now be declaring himself as any kind of space expert, it's like kids throwing stones into Loch Ness, then thinking they know more about whether or not the Loch Ness monster exists :-)
We used to do things like that as kids growing up near lochs in Scotland, then ride our bikes backwards all the way home, to show how "clever" we were.
It is amazing how investors fall for Elon's charm, more than maybe the knowledge of actual experts such as yourself Avi.
All I can say is, those investors would be spending their money more wisely by buying maybe something like this (These have longer duration! ):
https://letspartyfireworks.co.uk/products/space-x-rockets