He is doing exactly the same thing that generations of centre forwards have done over the years. They literally get taught to do it.
You're not wrong.
Football is getting softer and softer. We need to protect players from getting injuries!!!!
Maybe not play this game..?
Every physical sport carries risks of injuries. Football is not the worst.
20 years later, we shall play soft touch football, minimal contacts and risk free.
It's like the soft touch rugby, minimal contacts.
That said, it's a dick move by Kane admittedly. The decent thing he can do is to try and catch the defenders falling after backing them.
I never like it, defenders should always be aware of this and prepare themselves to jump and land safer.