Anything "weird" will change into "normal" when you get exposed to it enough.
Feel it strange to see a person with three heads once in your life?
Feel it strange to see a person with three heads after living for years in a country filled with three-headed people?
Or even just things like being around people with amputations regularly means some people lacking limbs is just normal. Or being around people with different skins tones and languages. Anything people are around enough becomes normal.
Not sure if the amputation part is sarcasm, but if new folks get born there, they surely have all limbs intact (unless there's a secret cult that creates amputees out of new peeps or something else crazy).