[yetihehe]

It wasn't "on shedule". Also, those launch vehicles were already old and proven (multiple times even!) when they launched humans.

[JonnyaiR]

Not quite, spacex changed quite a few things every launch or at least every version, that's why the first falcon 9 is very different compared to one from today. The one carrying humans is called block 5 of the full thrust version (version 1.2).

[qayxc]

That's not what they meant - SpaceX didn't develop a Falcon 9M or Falcon X for the crew vehicle is the key here.