Why?

"If teaching were a business, we would be filing for bankruptcy...The methods, the textbooks, the language we use, all of it is designed more to get rid of the unworthy than to throw open the doors...Let us devise ways to teach Physics that will make the subject...vital and appealing..."

---David Goldstein (APS News June 2000) as quoted by Paul Lorrain

Or in other words:

We used to have this...

...and now have this: