It's pvevp BR mode, and you have 10-20 old longtime players that played only pve that go into that mode to unlock cosmetics because they like it or they're just collectors, so of course they will try to find a way to avoid pvp, im lvl rank 13 atm and killed bunch of people, but the actual battles that usually end up with fire swirling are the least fun part for me personally.
I have like 400h in SoT and its pvevp game, but people that dont like pve try to minimize the amount of pvp if any and go "degenerate mode"(just for the quote) when they just go around and do their pve content to unlock cosmetics and such.
If we talk involvement then i would suggest blizzard to add more quests per match for these kind of players, so they stay longer.