How much did you spend on that pair of orthotics?
As previously noted here, there may not be very much in the way of actual scientific evidence to support the technology of high-tech running shoes.
Now, similar questions are being asked about orthotics regarding both their value and the science behind how they are designed.
In other words, if a given runner were to go to several different practitioners and have a custom made orthotic built to correct their particular mechanical “issues,” will the practitioners build similar orthotics? (Spoiler: Probably not.)
Their may be some science to back up the use of orthotics to treat certain transient injuries, but not so much for your personal, fundamental, biomechanical oddities.