And when he does, he'll get it right. Since that's what he does.
Until he turns his attention to it, though, I'm skeptical.
You'll notice that he said that it was "probably" not as hard and that he "might" work on it "someday". That's because he's smart enough to pick problems that he can make progress on that others aren't making. SpaceX does something that lots of people speculated might be possible but no-one was actually working on at the right scale and actually did it.
People have been arguing since the 1980s (if you count the original claims of the spaces shuttle, since the 1970s) that lower launch costs are possible.
But only Musk delivered.
You really think the established launch companies would have done that, as long as they earned lots of money doing business as usual? (Now their business model is dead, so they use their influence to get long time contracts with the US military just before SpaceX's rockets are verified...)
It would be interesting to see what you base your claims on?