This is one of those things that people want to state, and I hope that it is a matter of traditional thinking in a sense? Adam and Eve were created “very good” nothing Moses wrote states they were created perfect. See Genesis 1: 26-31 (NASB):
26 Then God said, “Let Us make man in Our image, according to Our likeness; and let them rule over the fish of the sea and over the birds of the sky and over the cattle and over all the earth, and over every creeping thing that creeps on the earth.” 27 God created man in His own image, in the image of God He created him; male and female He created them. 28 God blessed them; and God said to them, “Be fruitful and multiply, and fill the earth, and subdue it; and rule over the fish of the sea and over the birds of the sky and over every living thing that moves on the earth.” 29 Then God said, “Behold, I have given you every plant yielding seed that is on the surface of all the earth, and every tree which has fruit yielding seed; it shall be food for you; 30 and to every beast of the earth and to every bird of the sky and to every thing that moves on the earth which has life, I have given every green plant for food”; and it was so. 31 God saw all that He had made, and behold, it was very good. And there was evening and there was morning, the sixth day.
God said that the creation was “it was very good”. Nowhere does scripture say they were perfect. In fact, if they were perfect like God they would not have the ability to sin. Think about this. Whenever you hear that Adam and Eve were perfect, it may be a good position for conversation.