I'm not trying to play Dark Souls, I'm trying to actually have fun, you know, that thing people do to relax and feel good? If I'm relaxing and exploring on a Patrol for example, or just doing a quick story mission before I start working on something important in real life, no good comes from reducing the fun things that actually makes guardians special and worth playing as.
There is a balance to be had between the difficulty of a challenge and the fun of the abilities, and there are other ways to increase challenge without sacrificing abilities. I also think this idea that every instance of PVE needs to be very difficult is just silly; not everything is a nightfall and a raid.