I think we're all familliar of Musk being bad at promised deadlines lol. But yeah, even with the recent sucessful high-altitude test, we have yet to see an orbital test anytime soon. So yeah, it is safe to say that there's no definite proof yet that Musk can actually accomplish landing humans on Mars. But then, we also can't say that the starship progress is not going anywhere. Finally, we can just say that NASA and SpaceX have their advancements and pros, SpaceX for effective landing systems for rockets, and NASA for the actual accomplished plans of placing human presence beyond Earth.

We're not saying that NASA is becoming inferior. It's because Musk is envisioning on bringing people there soon. With NASA's budget right now, I think they are being careful about expenditure, funds is certainly what's holding NASA back. Not adding the fact that starship's purpose is for manned missions and high payloads. But then, there's no SpaceX without NASA.

Its better not to rush things. But with Musk's money and rocket company rapidly advancing, I think they could pull it off but not necessarily would. Life is at risk for a manned mission, and I think they can't just do that without assurance of safety.