If I touch in at West Kensington and travel to Ealing Broadway, and as
I am not needed to, do not touch out there... does this mean that when
I come home and only touch out at West Kensington I will be charged as
if I never left in the first place?

I travel to Ealing Broadway purely for Network Rail and I don't need
to go through any Oyster barriers when I arrive...so I only touch in
and touch out at West Kensington.