Good point. The bush course is a lot more valuable if it's taught by someone who has operational experience in the bush.
Unfortunately there are few such teachers available.
However there are a few and any pilot wishing to spend their money wisely must make sure the teacher they are choosing is the best they can find.
It is not all that difficult to check on the background and reputation of any teacher, all you need is due diligence.
The really good ones can produce proof their product is good.
A flashy web site is far from proof you will get a competent teacher.