This may come as a shock to you but not every likes PvP which means they don't want to practice, play matches or do anything else associated with it. Being aware of this isn't brain science.
No shock to me. My suggestion to those people - SKIP IT! If you're so fearful of PvP that it's causing anxiety, don't do it.
PvE missions set in a PvP area are NOT meant for PvE only
people...they're meant for PvPers who also like stuff to do while they wait for PvP.