@maniclucky The issue I think that you're having here isn't that you're not making good points. Your points seem correct to me.

I think what's going on is that you're saying "there's nuance", and there clearly is, but I'm deliberately presenting a simple verbal model in order to be quick and to the point.

I do agree with you largely, but I think my point stands: two equal contributors to a system differentiate when just one contributor is friendlier to their host system. That becomes the edge.