Any link, reference to support that nonsensical claim? Or is this simply more river's say so and your many pseudo-facts, that you pretend exists?
I don't believe you know what refraction is.
Do you know what refraction is? Here, let me help you....
https://www.google.com/search?q=ref.....69i57j0l7.8615j0j7&sourceid=chrome&ie=UTF-8
" the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density" .
So like the absorption and reflection of light, it happens with
that light hitting or directed at the intervening galaxy.
The observed gravitational lensing is the
light travelling through the spacetime around the intervening galaxy, from the distant quasar,
which we would never be able to see if it wasn't via gravitational lensing....as per.....