Not if you are talking about the same muscle. Sure some other muscle are activated as a stabilizers but if you are talking about using the muscle as it is interned to be used you first have to know it's function. Once you know that you will realize that you can not ever hit a different area of that muscle. It's physically impossible.
A muscle either contracts or it doesn’t - if you 1st understand that.
Contraction of the muscle fibres is its function to pull on bones via tendons.
Also How else but use a muscle as it was intended ?
Let’s take your view that it is impossible to hit a different area of a muscle
1, pls post your exact workout
2, The countless No. of bodybuilders from novice to top pro’s have Then
Got there training wrong as they include different angles & exercise
3, let’s take Arnold’s chest development- you’re saying his chest would of looked
Exactly the same from only doing say flat DB flyes
Or Tom Platzs thigh development would’ve been the same from doing just leg extensions
You have a interesting view , as did arthur Jones / Mike Mentzer view of doing only 1 set to failure.