I think when that predicament is there (and Allah karay that never happens), the choice is pretty easy…
In fact, I don’t think any parent would willingly put their beliefs above that of thier child’s health and well being..but I do know of some religious sects (not in Islam) where, for example, blood transfusions are not allowed…so if that were an option to save thier child’s life, there would be a conflict there.