In the USA, lots of road signs require basic English knowledge. E.g. You really need to understand what “Speed limit” means to be able to navigate the roads.
So, the English only test is really necessary!
I do not know, why this is not implemented everywhere?!
And "bridge height" , so they don't keep crashing into lower bridges. And maybe train some of these people, somewhere along the way we stopped training people how to drive properly.