"Tiny" is a relative term.... and may be based on hope rather than reality...

"I personally believe that the TINY amount of oil left in the bottom of the pan "

I don't know how much is left in the pans on our old cars ...
But I expect it is more than the newer cars which are designed to be changed from the top...
But I will bet you did not do the test I suggested to find out how much is left in there.......
It would not surprise me for the old cars to leave a quart in the pan.... which added to the amount not changed out in the oil cooler makes more dirty oil than I am willing to leave in my engine between changes....
But yall can do whatever you want with your cars...
I just wanted new people to hear the other potential arguments against it.