Until we start growing little parts of humans - https://www.nature.com/articles/s41580-020-0259-3

I mean, little parts at first...then whole organs, then whole systems, then everything but the brain, etc etc.

I've never seen it, but I have heard that is basically the plot for the movie The Island: What happens when we get to the logical end point and it turns out you need to grow a whole person for things to work right.

https://en.wikipedia.org/wiki/The_Island_(2005_film)

But far more effective unfortunately. Imagine the advances that could be made without moral obligations getting in the way.

Funny, I see zero evidence that the Syphilis experiment done on Black men in Alabama without their consent has done anything at all for the status or health of Black Americans.

It seems to me their lives still suck more than average for Americans.

https://en.wikipedia.org/wiki/Tuskegee_Syphilis_Study

I cannot comment on that particular experiment.