I was playing a lot of golf, walking the course wearing walking shoes, not specific golf shoes. I got a painful case of Plantar Fasciitis and consulted a podiatrist. (This was in the USA) He said "walking shoes" are not really stiff enough and do not support the arch well enough when walking long distances and on hilly terrain. He said walking shoes were more about comfort, light weight, soft, shock absorbing heels and soles,
Custom made insoles were very expensive but he guided me to insoles sold at larger sports stores. Sorry, I forget the brand but they worked very well and my symptoms faded quickly. They were quite rigid and had very specific arch and heel support. Maybe worth checking Decathlon Sports here in Thailand for good insoles.