That is not to say that a balancing approach would sanction xenografts. On the contrary, the current level of medical technology and resource allocation is such that a very good argument could be made that at least some xenografts are morally unjustifiable for many reasons. We would then be faced with a much more difficult decision under a balancing approach. Indeed, under such a set of circumstances, the benefits to be gained would be unlike the supposed benefits that occur in the context of basic research. That is, the prospect of a successful xenograft raises very difficult questions for the consequential moral theorist who balances interests.
Consequences are irrelevant where fundamental rights are involved.