BR interference with catcher fielding bunt

[IamMatt]

Is the reason that plays are treated differently when the BR and catcher are involved (I think Steve M used the term 'exception') that the the immediacy of the play and proximity of the BR and F2 make it virtually impossible (in some plays, like the ones in the OP) for them to react in a way (while playing normally) that would prevent any sort of interaction between them?

IOW on some plays, they are potentially tangled up on their first step, with no time to avoid one another, in contrast to the sitch posted of a runner from 2B to 3B interfering with F6 fielding a batted ball in which the runner generally has sufficient reaction time to avoid interfering(?)