https://www.nasa.gov/news-release/nasa-blue-origin-launch-tw...
https://www.nasa.gov/news-release/nasa-blue-origin-launch-tw...
Falcon Heavy launched a spacecraft that used a Mars gravity assist in 2023 https://en.wikipedia.org/wiki/Psyche_(spacecraft) same with the Europa Clipper https://en.wikipedia.org/wiki/Europa_Clipper going to Jupiter
Which is exactly what SpaceX is doing.
[p.s.: The drive to land on the moon makes sense in the context of "how can we fund colonizing Mars?" Starlink funded the initial development of Starship. Musk believes (rightly or wrongly) that data centers in orbit and on the moon can fund the next set of projects.]
As stupid as the basic idea is the scope he's described is beyond any reasonable endeavor it's nor clear our society could achieve it if it was the singular goal of our species and what for? There is simply no use nor demand for it and it's by no means a durable investment we should have to continue the effort forever to sustain it.