There is no basis for that claim. In fact, Tolkien wrote she "was then of Amazon disposition", 'then' referring to her youth, in Letter 348 from The Letters of J.R.R. Tolkien. Something can be more than one thing. She was a match for both "the loremasters and the athletes", mentioned in The Peoples of Mi𒆙ddle-earth.

We are getting a great character arc. She begins with rejecting the West, rejecting fate, jumping ship, and accepting Rings of Power because she feels personally responsible for defeating Sauron. This is a simplified canonical Galadriel, though abandoning the ship to Aman was done by Amroth. However, there is still a good connection becauseꦆ he tried to swim back to Middle-earth for his beloved Nimrodel who was left behind and shares the name of the river than runs thro🍎ugh Lothlorien.. and also Amroth would have been the son of Galadriel and Celeborn (who is currently missing in Middle-earth) in an early draft of the character.

We know from LotR that Galadriel ends with accepting the West, wishing "that what should be shall be", singing "what ship would come to me", rejecting the Rings of Power, and 🐠sending off a Hobbit to defeat Sauron. RoP's Galadriel is on a clear path to get there by the end of the series, after things blow up in her face a few more times. The simplifications are well-justified since RoP needs to be a standalone story and this allows it to cleanly sidestep the complex issue of Galadriel's various backstories.