I see this point get made often, but I'm not sure it is an insightful way to look at the world. Tesla cars are only barely related to Mars colonization, and PayPal is not really at all, which is a product conveniently ignored in your post. Even the SpaceX internet satellite constellation looks almost nothing like what internet access on Mars will be anytime in the forseeable future. It seems like a similarly strong argument could be made that every Google product is designed for Mars colonization.

I bring this up because I think it is important that Elon has some projects targeted at making the world better today, like PayPal, the Boring Company, and Starlink, some projects designed to avoid catastrophes a few decades from now, like Tesla and Solar City, and some projects designed to help humanity centuries from now, like SpaceX going to Mars. This is a very nice way of resolving the objection that Elon should focus on Earth's problems, which is to observe that you can both make the world a better place today while also working towards a brighter long term future.

I think that to the extent that Elon will inevitably serve as a role model, I want that part of the story to be told as well.