My experience is that Android users tend not to want to spend money on apps that much, even IAP is tricky. So sometimes it's not worth the hassle to go multi platform.

Considering it's a healthcare app, that PoV seems pretty daft and somewhat discriminatory. Catering to disabled people also isn't mega profitable, but we do it anyway.

An alternative PoV from me could be that going cross-platform means you can use the "rich users" iOS sales to subsidize the "poverty users" Android sales, same how our society does it with healthcare.