This is generally good advice. However, I did go to a shoe store that specialized in hard to fit feet and filled orthotic prescription shoes. All I got from them was the same old shoes I could buy anywhere, but they wanted to pad the heck out of them in an attempt to force them to fit. Needless to say, I did not buy shoes from them.
I have long, narrow feet - 10.5 length with a AAAAA width, which is very hard to find. Putting me in a B or D width shoe and padding it doesn't work. I know because I have had to do that with almost every shoe I ever wore. If I'm going to pay big bucks for a shoe, it is going to fit my foot without all that extra padding.