Hmmmm....I'm not a professional, but I'll tell you.....
A few years back, I also had plantar fasciitis along with heel spurs.
I went and got fitted for inserts, but I never used them, not even once.
What I did do was to start taking Apple cider vinegar (organic, and with the 'mother') each day.
I'm not saying it's what cures me, but I promise you, both afflictions are gone.
And they were remarkably unnoticeable within a few months.
So you may want to give that a shot?
😊