The idea and moral sentiment is understandable. It is, however, contrary to natural law to place an embryo into a woman who is not the real mother. Becoming pregnant and giving birth other than through the natural process of lovemaking is wrong.
And it is certainly wrong for Catholics to participate in unnatural ways of creating and giving birth to human beings.
While the sentiments are understandable, this is not a sound solution.
Whether such an action is always contary to natural law is debatable. The magisterium has not yet spoken on this matter.
And it is certainly wrong for Catholics to participate in unnatural ways of creating and giving birth to human beings.
The first part of your sentence, that it is wrong to create human beings in unnantural ways, is true beyond doubt. However, new human beings have already been created. Why is it wrong for a woman to adopt an already-existing human being and nuture him or her in her womb? Certainly, it is not wrong for a woman to nuture a child not her own with her breasts. Why is it wrong for her to use her womb?