I had a long discussion with a very honest, knowledgeable support tech this week about this very topic (among others). In essence there are two ring doorbell motion detection technologies - (1) the ring pro / elite and (2) everything that came before.
My ring 2020 version falls into category 2. It has very good motion detection across the range of view (eg. from left to right). It does not have good detection with motion which comes right at it. It has something to do with heat detection. There is less variance in heat when a body is coming straight on. (Ring : If I am misrepresenting this please correct me).
This functionality is different in the newer technology devices.
You (and I) may not like it but my doorbell is working 100% as designed.
I have come to the view I will be happy if the device acts as a decent video/audio doorbell (which I still need to put to its paces) and if I enable motion at some point and it ‘happens’ to capture something important - that is simply luck.
Scout’s honor - that is what I understood I was being told.