Problem with earlier simple Neutron and neutrino phase-shift example

Having finally extricated a reasonable explanation for the more complex neutron decay pattern that actually involves the W- Boson, in accordance with observation, the question has to be asked: why does the much simpler looking example neutron decay not occur, instead? This is a very good question!

The answer lies most likely below, in that there are going to be repulsive forces between the neutron and the neutrino that, just as with an electron orbiting a positron, simply do not permit the neutrino to get close enough to the neutron in order for the simpler pion ("gluon") phase-transition to occur. In addition, that exact same phase-transition pair would result in the electron being brought into existence way within acceptable boundaries for electron orbits. Thus the only other option is for the rather convoluted and much more complex W- Boson route to be used as the transition method.

All of which highlights the really important issue which has been glossed over, almost in passing, in the paragraph above: what the heck is the neutrino doing "orbiting" neutrinos in the first place?