I think it’s really important to understand the biomechanics, and then think how your habits cause the biomechanical problems to occur causing plantar fasciitis. This video is a really good starting point for the foot (it’s dense, probably needs a few watches): https://www.youtube.com/watch?v=p8ttNMNAX5k
The gist is that the foot is sort of a ‘tensegrity’ structure, and our modern life tend to collapse this structure.