Foot orthotics are a widely used treatment for a number of foot and leg dysfunctional problems. They are designed and used to fix structural and functional issues. All of the scientific evidence is that they are likely to be very effective and the patient satisfaction type evidence shows that they are well accepted by those that use them. That does not imply that they don't have issues. They certainly do have problems. They are able to only be used in a shoe that has the space for them to fit into. This means that they can not be used in certain kinds of sports shoes and some footwear used in particular jobs. Also, in some climates closed in shoes are not too common due to the temperatures. Some individuals just have a philosophical opposition to foot supports because they see them to be unnatural and as crutches that ought to not be used.
While foot supports are pretty straight forward and can easily be designed to work in the short to medium term you will find solutions if users desire to follow that option. Exercise therapy is one alternative and muscle strength could be improved and used as an alternative. On the other hand, this tends to take several months to work and it may be a wise decision to use foot supports in the beginning as they can help get some good improvement almost right away. If shoes are the problem and it is not possible for financial, work-related, sporting or lifestyle reasons to change the footwear, there are choices like the Archie Flip Flops which come from Australia and have a decent volume of arch support constructed in. There are other kinds of footwear like these which do have support integrated, however the amount is quite smaller compared to the Archies and might not necessarily do much good. As always it is best to speak to your podiatrist as to what they think is the better choice for you.