Haha there are definitely no familial bonds between my wild betta fry. If it is small enough and slow enough to fit inside its older sibling's mouth, it is food.
However, what I am trying to say is that there are other 'deformities' out there being bred such as rosetails and feathertails that don't seem to garner such outrage except for a handful of members.
You only have to do some research on X-factor fish to see some of the downsides to those kind of extreme tail types. Personally, I find that much more disgusting than a single fish with a tumor/growth on its head.
Yet you see people purchasing and breeding these excessively branched fish without any idea as to what harmful genes they could be passing on.
Seems sort of an out of sight, out of mind type attitude.