I respectfully disagree. nobody IRL has weird disproportions? is definitely inaccurate. I was born with a condition that causes body disproportion and I know other people with similar or another condition that causes body disproportions and not noticeable unless you bring direct attention to it. There are many genetic conditions that can cause this btw not just the one I have.
MANY people in real life have different proportions, most do NOT fit the golden ratio at least according to the doctors I've seen(26 at this point) and some tailors I've known.
It really depends on race, gender, DNA, ethnicities that cause differences. two 5'10 people can have different proportions. Long torso/short legs vs long legs/short torso despite the same height. You can find a lot of examples with KPOP stars. The majority of them are mostly legs. There are tons of studies of skeletal abnormalities (what I have), the genetic effect on limb differences.
I think most people aren't aware that those conditions/issues exist unless you have them but doesn't mean we don't exist. People with scoliosis tend to have a distorted torso and many I know end up getting butt implants to increase their sitting height and ease their backs but that's a whole other conversation.
if any want more info on skeletabl abnormalities on body disproportion then they should do a deep dive in scientific journals about this for more accuracy