People ask this about God - why did he create us so weak, feeble, easily swayed, prone to wickedness and self-indulgence?
The question cannot be answered until we have an understanding of our metaphysics, our own basic assumptions about the structure and purpose of reality. Once we know that, the question can be answered.
From my assumptions, humans were not made or created to be weak but that is what each of us is intrinsically and necessarily. We start-out weak. We had a pre-mortal spirit existence before we chose to be born into mortal incarnate (embodied) life; and during this pre-mortal life some became stronger than others such that some are born stronger, others weaker.
Some people have more to learn. Presumably the weakest are among those who have the most to learn, and that is why they are here, and why they wanted to be here - if you are weak, you are among those who stand to benefit most from the experience of life (i.e. benefit most in terms of strength and goodness).
(Think of someone whose innate weakness was in terms of proneness to addiction, and who by great effort overcomes it by choice, through faith in God and Alcoholics Anonymous - what an amazing and spiritually-valuable amount that person has learned from the experience of mortal life.)
Mortal life is part of the process of experience and learning by which we may (if we choose well) become stronger persons (stronger in love, goodness, resolve etc - and stronger as individual and unique persons participating in relationships).
It is not possible for God to make mature and strong persons as a finished product, because an essential part of that maturity and strength is a consequence of living, choosing, experiencing.
Mortal life is a tough school, but it is a school for divinization; God´s love is tough love - because that is what most of us require, because we are weak.
So God did not make us deliberately to be weak, instead that was how we began - how God ´found us´; and this world and this mortal life is one of the ways in which we may become stronger, in preparation for the next stage of post-mortal resurrected life.