Why would Grab need to "convert professional drivers to real maps"? According to the article, it's already solving for all the unique problems by building out their own map.
Your reads to me like you expect that if someone comes to you and gives you GPS coordinates, you should be able to know where that is because you have a GPS in your pocket. No, you'd need to put the GPS coordinates into something and have it translated to something that made sense for you, like into Google Maps. Same goes for Thais, even if it's a PITA for you.
Unique problems require unique solutions, and I think your definition of a map is probably too closed-minded. Imagine trying to take a real map and deliver something here: https://www.youtube.com/watch?v=wQyVMy6_n1k
Your reads to me like you expect that if someone comes to you and gives you GPS coordinates, you should be able to know where that is because you have a GPS in your pocket. No, you'd need to put the GPS coordinates into something and have it translated to something that made sense for you, like into Google Maps. Same goes for Thais, even if it's a PITA for you.
Unique problems require unique solutions, and I think your definition of a map is probably too closed-minded. Imagine trying to take a real map and deliver something here: https://www.youtube.com/watch?v=wQyVMy6_n1k