Could I just wear over-the-counter arch supports?

Over the counter arch supports are not orthotics.  They are not made for anyone in particular.  While over the counter arch supports can provide some relief of painful foot conditions, they are not ideal.  They are not custom made to your foot so they do not know the position your foot is supposed to function in.  It’s like taking a pair of reading glasses off the shelf at a pharmacy when you really need prescription lenses.