I'm not sure what strawman you are talking about, but every space company in SV I have seen has been started by domain experts, mostly aerospace and hardware en

I'm not sure what strawman you are talking about, but every space company in SV I have seen has been started by domain experts, mostly aerospace and hardware engineers. There are also a lot of space companies focusing on a narrow niche that doesn't involve rockets — sometimes imagery (Planet, other satellites), sometimes 3D printing, etc. It's not like deep training in aeronautics will make you an expert in 3D printing in space - there's not a 101 guide to the space, it's novel tech.