I hate it when a show leaves me emotional but I still have to just get on with regular life. Like, I have to wake up early tomorrow and go to the doctor and tidy up because maintenance is coming in next week and do my job and ugh #CallTheMidwife
The show has been careful to set the nuns up as good people trying to do good, but that's a lot more believable in the London setting. Until the very recent mention that they see themselves as missionaries, I was reading them as people caring for their peers.
Since the show started in the 1950s when the NHS was new, it was clearer that the nuns were there had until recently been no alternative. The show established that they are doing good work that is valued by their patients, and that credibility has persisted
But taking a bunch of nuns who see themselves as missionaries and sending them to another country to work with what is almost certainly going to be an Indigenous population is reminiscent of all too many historic harms, and it would be very tricky to write away from that
(Of course, it's also possible that, in actual real life, missionary nuns working in London did similar harms to what missionaries do elsewhere in the world. But as a viewer, it's easier for me to believe the writers when it's further from my time and place and closer to their time and place)