Yes, evidence goes a long way to prove, or disprove, claims. Without evidence, opinions are just that opinions based upon personal biases.
I have crashed on bikes using all sorts of condtruction material, steel, aluminium, titanium and yes carbon.
In fact I have crashed twice with the C60. First time crashed against a K-rail on PCH and broke a finger. The C60 was fine. I crashed another time, also with the C60, hit my head and suffered a subdural hematoma. Once again, the C60 was not damaged.
Finally, last year my car was rear-ended with the C60 on the Thule hitch rack. The car suffered damage, the rack was totaled. The C60 suffered only cosmetic damage. I sent it to Calfee where the bike was examined and declared safe to ride.
I support your enthusiasm for steel bikes; two of mine are good old steel. I also support your decision not to go with a CF bike. CF is not for everyone. Interetingly enough, you would buy a saddle with carbon rails, none of my saddles have carbon rails
I just have a problem with claims that lack the evidence or science to back them up.
Ride safely, ride long.