Why blend?

[melbee]

This seems like a silly question when I am so far down the line, but I have not worked this out and its bugging me.
If you were doing a set of enhancements using a pink masque and white, then tipped with a natural colour 'non blend' enhancement, why oh why do some people still say you have to blend?? Also, the pre designed tips cannot be blended and no one seems to have a problem with them.
Note, I said using a pink masque so this would obscure any line, just before everyone shouts at me to hide the line!

 

[geeg]

I blend to keep the enhancement as thin as possible but with the most product rather than tip adding any bulk. The product is stronger and more durable than the tip material therefore ... More product, less tip material. It is not just a matter of hiding the tip; not only about what you can see or not see ... It is about structure and balance and beauty.