Noldor Man's saviours?

[Gwaihir the Windlord]

I just had a though while making a post in another thread about the Noldor; if the Noldor had not left Valinor to fight against Morgoth as they did, resisting him and hemming him in at least for a while, what would have become of Men? Most likely they would have all been corrupted for ever by Morgoth. If they had not stumbled into the fair lands of Beleriand, which were largely built and protected by the Noldor (the Sindar would have soon fallen), then Man's course in History would have ended there. Falling in with the Elves in Beleriand was what enlightened us, and what saved us from corruption and domination by Morgoth.

Most of the other Men in the world were barbaric; the difference in the Edain was the influence and protection of the Eldar. This would not have happened without Feanor's rebellion. It is probable that we would have been lost to evil and misery, had not the Noldor exiled themselves from Valinor.