Your argument is the definition of weak, and your analogy is terrible. You should do more research before spouting off about stuff you clearly know nothing about. You'll get modded down, so most people won't see this, but I'll just leave this here for your benefit anyway.
Sierra Nevada is a *group* of companies, not a single entity. And the people and companies involved absolutely have track records for "technological ability in space", some of them much more extensive than that of SpaceX and Boeing.