Having to spend $15B as the cost for making an impulsive decision (when you can afford it) is a first world problem.
No it does not, SpaceX results speak for themselves, they have no competition. Same with Tesla, just check their vehicles sold charts.
Tesla's competition: every other car marker.
More generally so, I have no idea why people expect any company to own a market completely. Any market is usually big enough for one than one company to be successful.