Sigh, that is so not the case for me, but as I said, my feet are just not normal! I have duck-shaped feet, wide in front and very narrow at the back, so if I wear a shoe without a strap, I walk right out of the heels every time, and can sounds like I'm wearing flip-flops.
But I *know* that's just me!
And Zara, you sound like maybe we are related - you have what we call in the family ski-feet! Long, narrow and, well, flat! My sister has that kind of foot, my mother used to say, when we were kids, that she would gladly pay someone good money to take the two of us girls shoe-shopping!