I think you all know better than to learn theology from ecchi manga, but just in case you don't; goats are not symbols of the devil.
Occasionally you see a picture of Baphomet as a goat man as shown in the chapter, but the goat image was first drawn in the 1850's by an edgelord French author...
For most of the people I know the choice on what to do wouldn't be even an issue; regardless of personal impact, or expense, or the possibility of being unable to continue care in the future.
But I suppose it could be viewed through the lenses of moral ambiguity and natural selection if one...
This is a somewhat unique story as far as isekai go and I'm quite enjoying it.
I see some people here in the comments are complaining about pacing, but I'm not seeing a problem. Perhaps they're novel readers.