I used to buy shoes that weren't comfortable.
Then I went on a round-the-world trip for a couple of months and wore a pair of totally flat, velcro-fastening shoes or flip flops the whole time.
When I came back I found my feet had "grown" (in fact destressed) a whole size and my wardrobe of 40 odd pairs of shoes was no longer any good to me.
Plus my feet looked and felt so much better.