The issue here is that for a commercial venture, cost matters a lot.
USA in 1960s did not have an alternative option of using someone else's launch vehicle for a fraction of what it would cost to build one themselves; companies who want to build a commercial space station do have an option to buy launch capacity from SpaceX instead of Boeing/BlueOrigin, which would still be more expensive even if all their plans and promises materialize on the scheduled time.
