This isn’t an English issue, your English is great and I couldn’t tell the difference compared to a native speaker even if I looked for it. “But” in a discussion as the you’ve made can be looked as a separator. On the left, it’s a sale pitch. Ground prep for the reader to buy into what’s to follow after the but.
I used to do this all the time so I don’t blame people who do it too.
I’m not gonna delve too much into SpaceX. To me the accomplishment of that company is largely thanks to the employees. Elon Musk does not strike me as a competent engineer or manager, he’s just a guy with a lot of money and sometimes he makes good use of it. To me, he isn’t worth the benefit of the doubt. It’s your time though and if you think a billionaire is worth it then who are we to judge?