I think you're vastly underplaying the importance of RSA to cryptography. Personally it was the first time I was exposed to the concept of public key cryptography (in the 1980's). "would have been delayed by some years" is very dismissive. The same thing can be said of many inventions. Yet someone is/was the inventor.

RSA were the first to provide a practical and easy to understand implementation and that had a huge impact in practice.

That's not to downplay Rabin's or others contribution. That RSA pursued a certain commercial strategy that you may or may not like is not really relevant.