That's an incredibly expensive bad idea. Dialysis will likely be necessary and the beating heart corpse just kind of slowly breaks down over time with multi system organ failure. 9 months would require a heroic effort at life support. Makes sense it was suggested by a philosopher. She also suggested using male bodies as incubators. Might as well use pigs if you're going that far. Humerous that the philosopher that suggested it was a woman though.
It is a good thought experiment to gauge where people stand on brain death and personhood too I guess. I obviously think a body with a brain that is dead to the stem is just a corpse. That brain will actually end up liquefying because it is actively necrotizing.
In reality, I also agree with the premise that actual surrogacy is worse. An economic trade where someone rich buys someone else's health is no different than buying a kidney. So that point they made is absolutely not wrong. Surrogacy should be abolished, though this obviously has no chance of taking it's place.