As someone who is active in the Donor Conceived Community, being a product of donor sperm, this process would remove a lot of trauma from the offspring of these arrangements. A big problem is that a lot of offspring did not receive the benefit from genetic mirroring which causes some issues when the child is not informed at the earliest age.
Some of these problems stemming from this trauma include developing trust issues, feeling of not belonging, and even a poor ability to recognize faces later in life. There’s also the problem with large sibling groups even to this very day due to fragmented rules and sparse regulations.
Growing up with genetic family does prevent the bulk, if not all, of complaints fielded by offspring such as myself. This is it something parents, both perspective and current, never want to hear because it’s upsetting, uncomfortable, and it’s a threat to their self. If they accept this, they accept that no matter what they do, they may never be good enough if using an anonymous gamete donor. While this is not true if you take a child-centered approach, the conversation has usually ceased by now.
Newborn babies are not a blank canvas for painting upon, nor do they exist to please and serve their parents. The DNA they are born with links them back to their biological parents and absence of one or both without that knowledge is trauma, unfortunately.
The pedants are going to catastrophize with wild hypotheticals from their armchairs, but I know this can be transformative for many who seek gamete donation and greatly beneficial to their offspring who are born with this technology.
I don't think "but yeah what if you steal rich people cells and make a baby and then totally blackmail them" is quite the ethical quandary some people seem to think it is, however. It's clear to whom this is a purely navel-gazing academic exercise, and to whom this offers life-changing possibilities.
Seems like you're trying to go for a bit of a motte and bailey argument here. The issue you raise is valid, but it isn't the one being raised in the other comments, which is making celebrity babies for the purposes of blackmail, and it isn't the one my comment was aimed at.
It's rare that this happens, but the law should have a provision for this case before this technology can be used without repercussions. Not only because of the question of "who's the father" but also because of laws forcing biological parents to pay child support, for example, regardless of how the child came to be.