This has come from an outfit called The Sensory Support Service (SSS). From what I can make out, many local authorities have set these up. I resume they get funding to do this. They seem very keen on providing 'guiders' to children rather than let them move about independently. I cannot help be suspicious that the opinion that this girls stick is dangerous, is just a pretext to get a Sensory Srvice Support worker into the school full time. It is more about justifying a job placement than helping the child.
The SSS Guidance notes for blind children states:
// It is important to remember that this is a recommended technique but that if someone already uses a technique which they are comfortable with, is safe and they are confident using it, then they do not have to adopt this technique. There may also be social, cultural or physical reasons why someone prefers to use an alternative technique. //
http://www.sensorysupportservice.org.uk/wp-content/uploads/2014/01/Full-Training-Document.pdf
In this instane, that seems to be ignored in their haste to get the SSS into the school.