Personally, I'm a little baffled - the tweet reads like a caricature of a pro life argument, but it's a big movement I guess and I know there are many with odd views.
Fwiw, as someone who is openly prolife, I do not think a woman is just 'an incubator' and I consider such views to be contemptible. I understand the different points raised on this thread, and if you truly hold that a life in utero isn't actually a life, then obviously none of this is even a question.
The trouble for me, and the reason why I've found myself so uncomfortably straddling the fence on this, is every argument I've seen used why a foetus is not alive, if it were used on someone who has actually been born, would be seen as an horrendously dehumanizing attack on them.
Therefore, logic tells me I cannot accept those arguments, the unborn are alive, and so I find myself in this horrible limbo of believing very firmly in the importance of female bodily autonomy, but having this firm line that killing someone else doesn't really come under personal rights.
I have no answer to this conundrum at all.