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?
Yes, I was being entirely sarcastic, in response to the comment above my own. I recognize that Musk has done and continues to do the impossible on a daily basis.