Those expensive medical machines require a lot of infrastructure to operate properly. You could get a machine there, but you likely couldn't provide it clean and reliable power without additional equipment and technicians to maintain it. Bootstrapping infrastructure is stupendously hard and expensive (and is a huge measure of a country's wealth - a lot of the US wealth is tied up in structural infrastructure like power lines, roads, plants, etc). It's a generational process taking decades to bootstrap.

All the while that is getting built people need help now, and this clever adaptation of a toy fills that niche. Eventually they'll have access to the more advanced modern wonders, but for now this can help people almost immediately.