The OP wrote:
“the majority of women are not intellectual prepared to be taught”
There are 2 distinct points:
1) A minority of women do have the motivation and ability to learn. Those women should learn, and always have.
2) Should there be a curriculum in schools teaching women aspects of Torah that are not needed for practical observance (including da’os). Here the answer is no.
However, the crux of the question is what is, in fact, needed for fully engaged, practical observance. This will depend on the level of literacy women have in a particular time and place. One thing is certain. There is no virtue in perpetuating ignorance.