pretty simple! They make loads of money by offering lasik surgery.
If people learn some simple techniques to improve their vision it is not in their interest.
This is why they will discard other approaches like eye training: Because it competes with what they offer!!!
I want to show you this video simply to give an example of how a lasik surgeon will convince you of going for surgery:
Now, I am not a specialist myself. I have no clear cut opinion on this.
More on the dangers of lasik surgery
Stay awake, ok?