Well partially, but it would require huge infrastructure investments to get those launch rates up much. And those items have absurdly long lead times (partially

Well partially, but it would require huge infrastructure investments to get those launch rates up much. And those items have absurdly long lead times (partially by design). The RS-25E (non-reusable SSME) is incredibly complex, and you are not gone mass produce them anytime soon. Even starting a very limited production line cost billions. So sure with infinite budget many things are possible, but they are simply not going the happen. The rocket is simply not designed for high launch rates.