I should hope not. Not everything works first time. Hopefully it gives data such that the next one works for 16 weeks, and the one after that for 3 months, until this is a standard source of transplant organs.
Not sure that’s a good trade for the pig though.
Don’t misunderstand me, I love meat, and while I think that killing pigs (at least someone else killing pigs) is acceptable for that purpose, I would have a harder time justifying killing a whole pig to keep someone alive a little longer. For the same reasons we don’t just raise humans as cattle to use as organ transplant sources. We tell ourselves that it is acceptable with pigs, and while this certainly makes it easier on the humans (and they grow faster), I’m not sure it’s fundamentally different.
I'm a little baffled by your ethical calculus here. Raising pigs for muscle to eat seems substantially less ethical than raising pigs for organs to transplant; you can eat plant-based alternatives, but good luck pumping blood with a soybean.