The most important component in achieving this ideal has to come from the man in supplying all the needs that the Bas Melech does not need to venture forth.
This concept was seen by the family of the Kohain Gadol, who was required to be wealthy.
To impose this on a woman who does not have such a husband or the prospect of having such a husband can be cruel.
The reality is that presently the supply of men able to fully support their families is limited.