I understand the point you are making; however, your use of 'natural' is incorrect in the overall sense - that which is 'natural' is that which follows the natural order.
The "junk food" statement may be considered to be 'typical' or 'common' - but, it is not 'natural'. The "healthy food" statement depicts what is 'natural'.
You are confusing 'usual' with 'natural'.
What sin has caused is not 'natural'.
Death and decay are not 'natural'.
However, they are 'usual'.
I know you want to think of it that way because of modern science terminology; however, in the "bigger picture" [of truth], it simply is not so.
The natural order is that which builds, grows, sustains, perpetuates, etc. - 'life'.
Laziness, decay, and death defy the natural order.
Do you understand? Do you see the difference?