Of course it shows a precedent; it set the precedent for over a hundred years in America.
As for being pressured into running for a second term, what's to say he didn't give in to pressure because he thought a second term for him would be best for the Republic?
Heck, Washington, in the very quote you used, said as much:
The strength of my inclination to do this, previous to the last election, had even led to the preparation of an address to declare it to you; but mature reflection on the then perplexed and critical posture of our affairs with foreign nations, and the unanimous advice of persons entitled to my confidence impelled me to abandon the idea.
CR
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