It will be more useful..
I can't see an Input node here,
If you mean something like a specific VPR input in the root node,
I will see if there are really user requests for this,
but nowadays, the Pixel Filter node editor is almost useless
for a F9/10 render, because of the lack of buffers
since the 2018 renderer introduction.
As a temporary utility i.e for tweaking lights,
it can be just remove or disabled.