... if a doctor notes that I am fat and therefore at higher risk of certain illnesses, this might be upsetting. But also accurate. If a clothes seller notes that I need a larger size, or a horse trainer notes I can't go on the smaller pony, or whatever reason - I can't just identify myself onto a smaller pony, without potentially hurting the poor wee thing, or squeeze into a size 10 without bursting the buttons. There are hurt feelings, there are our deeply held wishes (I'll never be a size 10) and there is reality.
To prioritise my right to think of myself as a lissome skelf over a pony's right not to carry someone too big and heavy for its spine is not right in any way, it doesn't help me or the pony, in the long run.
To say that anyone trying to step in to protect the pony is not allowed to mention my weight but somehow needs to pretend that although I am a size 10 I will yet not be able to go on this pony is unworkable. To criminalise the person trying to protect the pony is absolutely beyond reason.
I think I have maybe had enough of the pony metaphor, now - can someone help me down, please?