Well put!
I am 187cm tall and have to be constantly aware of low signs, low poles holding up shop shutters/blinds, low doorways etc. ("Duck or Grouse"? ) Once in Surat Thani I turned a corner and could have been blinded by the cross bar sticking out from a street light.
OK, this is Thailand, their country, and all things are constructed by Thais with Thais in mind, and head height to them is quite often eye height to visitors or tourists, so a little bit of foresight would not go amiss when they are constructing the shops/stalls etc. As already mentioned, often the pavements are in such a bad state of repair that you need to have eyes like a chameleon to stay safe!!!