Why don’t boot makers increase calf width for larger shoe sizes?

I don't understand why the circumference around the calf for someone who wears a 10 is still the same size as someone who wears a 6.
When it comes to boots, you made the heel bigger, but everything else is standard size, and then
most boots don't come in wide calf ranges. They're sold out or their designs are boring. I ended up settling on boots below my calf
Why don’t boot makers increase calf width for larger shoe sizes?
Why don’t boot makers increase calf width for larger shoe sizes?
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