These are good points, and useful lessons for any entrepreneur.
The great thing about SpaceX is that they use advanced technology very appropriately and pragmatically. They didn't design a carbon fiber body SSTO RLV or anything like that, they built a 2 stage LOX/Kerosene expendable rocket, a design that's been around since the 1950s. They built a small vehicle and spent a few years building institutional knowledge of building and operating orbital launchers. Then they used that knowledge to build products that were competitive in the market. Now they're continuing to iterate like crazy and building a lot of exiting new things off of what they've already proven: the manned Dragon, Falcon Heavy, Falcon 9 v1.1, and Falcon 9-R.
If they continue to put a consistent amount of effort into iterative R&D they'll not only own most of the orbital launch market they'll own a lot of new markets that don't even exist yet.
They're just applying common sense and building obvious designs well to compete in a market filled with companies that aren't used to strong competition.