I have been reading some post about HP but still dont get how you gain or lose HP, correct me if Im mistaken, if I atack someone with a high defence and low resources and I win then I get HP, and if high defences and a lot of resources???

Draw battles give HP to both players?? I got a draw a week ago and we both got HP, also, what applies to the defender to get HP? (I know that defender will never lose HP)

can we say that this system has been implemented to force fleeters to atack bunkers without getting profit so they can weaken the defences to let weaker players attack the bunkers???