this from a guy with one foot size 12.8 and the other foot size 13.6. My feet have hurt every day since I was a teenager
PS I would pay, like a lot, to get shoes to fit my feet exactly
While the machine was doing its beepy-flashy dance, I told the sales guy I bet he could beat it. He did. The machine recommended a width they had in stock. Sales guy himself told me to order in a different one.
There are old patents for electro-mechanical devices. The dream goes back a long time.
Meanwhile, even bespoke makers in London do test fittings. They'll often start with mock pairs made of scrap leather, then investigate the fit destructively. It isn't just how the feet are shaped and how they move, but how the shoe will move with them, how the shoe materials will form over the last, how the shoe materials will stretch and sag over time, how the design of the shoe itself will affect the biomechanics. It's an incredible trade.
Maybe a store like that doesn't exist in your country, but it's definitely a thing.
Also, ordering custom anything to your body is an ordeal. Most folks wouldn't be okay with waiting weeks for shoes that don't fit them right only to do a back and forth for weeks trying for a perfect fit.
that said, you can absolutely buy custom shoes and trainers if you mind them not being from Big Sneaker. Usually starts at US$400 and takes about six to eight weeks to get.