Does the savior sibling get to choose to be a savior? No one should be forced to donate any of their organs/tissue against their will. And let's face it, a baby's or very small child's will is impossible to reasonably determine. Essentially you are bringing a child into the world for the sole purpose of inflicting pain and unnecessary procedures on them. Yes, very pro-life indeed.

Instead, there are two better options:

In the short term, the government needs to implement a better public education campaign on organ and tissue donation. Maybe spend less on those ridiculous anti-drug ads that do nothing. Increasing the number of able-bodied adults willing to donate is better than forcing siblings to donate.

In the long term, the growth of tissue and organs in the lab is a much more ethical option. There have been great strides made in this area, but research is hampered by politics. We need to put policies in place that help the researchers in this area to receive the funds and freedom to do their jobs.