For two and three, even if there weren’t a genetic component, the lifestyle and dietary habits of a family absolutely do impact the next generation of the family. Learned behaviors that increase the risk of alcoholism or heart disease absolutely count as “runs in the family”. Further, “runs in the family” never meant “everyone in the family absolutely has it”.

(None of this directed to the comment I’m replying to, just continuing the thought of the comment.)

Or the third option of they recognize that scientifically Pluto is a dwarf planet and no longer a ‘full’ planet, but they also anthropomorphize everything to an unhealthy degree and don’t want to hurt the feelings of Pluto by saying it isn’t a planet anymore

Your numbers are growing! I’ve met one of you in the wild 10 years ago!