In my case, it absolutely matters.
I've posted that at a size 12/14 (and to be fair to myself mainly a 12) I am currently clinically obese with a BMI of 30. The 3 stone weight gain genuinely "isn't my fault" as it's come about suddenly through an illness last year. I could easily excuse myself, say I'm "plump but pretty" and "only a size 12 for goodness sake" and work towards "body positivity and acceptance", call this a "real woman's body" and try and get myself in some sort of trite Dove Beauty campaign.
But here's the truth that I can't "see" in the mirror.
In my 30s, my weight gain alone has led to;
Prediabetes and high Cholesterol, a real worry as both parents had heart attacks and strokes in their 50s, my great grandmother died suddenly in her 40s from a massive stroke and so did two great aunts. All "plump but pretty" between size 12 and 16 by todays standards.
All of a sudden, needing a knee operation due to strain on heart.
Sinus Tachycardia and blood pressure problems.
Breathing and mobility problems.
All through weight gain alone, nothing else.
In the past month, I've worked out I've cost the NHS at least £2000 in appointments and tests.
But, hey, I look "pretty", "voluptuous" and "curvaceous" in the mirror so it doesn't matter, does it?