So you make a supposition about people's motivations for not being in open (as well as the motivations of people presenting another plausible possibility).Assigning the desire not to be interfered with or inconvenienced by PvPers and gankers/PKers the labels of fear or cowardice almost always comes off as a weak, or perhaps even desperate, attempt at shaming people into playing the part of victim for PvPers and gankers/PKers. It tends to put people off ones other arguments even when there may be some meat worth chewing on in them. Few people are scared of PvPers, we are annoyed by them and uninterested in their gameplay.
I am against any weighting at all at this point. I used be fine with considering a certain amount of weighting for PP, but that quickly went away when many of the people arguing for that, kept going with "recommending" open only, neutering block, and other measures designed to force other people to play with them the way they want to play. Never even understanding that most of those players would just leave the game in short order, or outright avoid places like CG, Deciat, or ShinDez and the like, and they would be there alone in open with fewer and fewer victims anyway.
Block is the bane of the PvP player, the fact that it exists at all in it's current form should indicate just how optional Fdev considers it.
Block, if it interferes with free instancing, is the bane of people wanting free instancing in open. This is the sort of myth I'd like to see vanish from the forums.