Adam was biologically imperfect.
And that's correct:
46 And he said to them, "Set your hearts to all of the words which I bear witness for you this day, so that you may command your children to observe to do all the words of this Torah.
47 For it is not an empty thing for you, for it is your life, and through this thing, you will lengthen your days upon the land to which you are crossing over the Jordan, to possess it."
Id est, God created Adam with plan in mind that he should be neither perfect nor inherently guided, he needs a helper to walk in the right way.
Naturally speaking, it can be considered that the human weakness is actually his strength, because our ancestors main target and question was:
How can I improve the situation?
This in fact is still our concern, we always change what's present, and what we had yesterday became obsolete, and what is waiting for us tomorrow is our goal to achieve, yet not satisfied.
Why all the progress? .... Because that was the main point for creating mankind weak:
Genesis 17:1 And Abram was ninety-nine years old, and God appeared to Abram, and He said to him, "I am the Almighty God; walk before Me and be perfect."
Although I'm a Gentile, the perfect human is not with the perfect organs, but the one who follows God's path, and we can still see that His planning for creating all beings with weak points helped mankind with positive results, for example:
- It improved our understanding of anatomy, hence healthcare.
- Emphasized excavating nature for resources and life needs.
- More effort to reinnovate our sheltering systems.
- Helped us to establish citizenship, a community is what any human needs.
- Better solutions for daily life problems like transportation, computation, data collecting, education systems, engineering, communication, etc...
All of these achievements happened for a reason, that we seek to improve based on what God left us to deal with, that's what He taught Adam when he sinned, that Adam must find a solution to progress.
It will also make sense if you flipped the case by purposing if God created Adam perfect without weakness, and this is where God's wisdom explains itself:
Numbers 23:19 God is not a man that He should lie, nor is He a mortal that He should relent. Would He say and not do, speak and not fulfill?