Every single one of those examples is both valid and - I believe, at least - misunderstood.
Musk has a singular goal as far as I can tell: to make humanity a multi-planetary species. All of those things are testing the boundaries of what's possible in areas that will or could be very important for building a permanent settlement on Mars.
I posit that while there's much room for debate around whether or not those projects are viable, as far as I can tell everything Musk has done has been in service of building the corporate framework, talent pool, skills, and technology necessary to colonize Mars.
Ok. A permanent settlement on Mars. Given the personal control structure at play in his companies giving him autocratic control there, why would anyone believe he wouldn’t be anything but a Martian autocrat, and who in their right mind would willingly submit their own sovereignty to Emperor Musk the First of Mars? It’s not exactly like you could change your mind and walk away. You’d be literally putting your life in the hands of this wildly erratic person.
While my own views are likely closer to Musk's than I suspect yours are, I share those concerns. I don't think I'd be interested in moving there, at least not in the initial waves.
My optimistic view of the future looks more like "The Moon is a Harsh Mistress" than "Total Recall".
I'm sorry, you'll have to do an awful lot of explaining to do if you want me to believe Hyperloop, a 100+ year idea proven not to work, and the Vegas Loop, one of the most asinine infrastructure projects I've ever witnessed in my life, could possibly in any way whatsoever contribute to life on Mars
Terrain is the best available protection on Mars from radiation, and is it's far easier to pressurize a structure excavated from bedrock than it is to pressurize a dome or similar.
Hyperloop and the Vegas Loop are projects used to justify the existence of the Boring Company. The Boring Company's tech is definitely relevant to extraterrestrial habitat creation.
Musk has a singular goal as far as I can tell: to make humanity a multi-planetary species. All of those things are testing the boundaries of what's possible in areas that will or could be very important for building a permanent settlement on Mars.
I posit that while there's much room for debate around whether or not those projects are viable, as far as I can tell everything Musk has done has been in service of building the corporate framework, talent pool, skills, and technology necessary to colonize Mars.