It takes far more skill to know when to use something than it does to just have some passive boost randomly apply to you. Hence why active dodging/active defense games (GW2 for example...manually dodge and manually block..NO PASSIVE DEFENSE) take far more skill to pvp in. The more passive buffs/defenses you have the less skill is involved. It is rather the definition of skilled gameplay by making everything manual and nothing automated.
Opinion. You may think it takes more skill, but that's just your opinion.