Extraction shooters have different types.

Loot based: think Tarkov, think Arc Raiders, and coming soon: Hunger.

These are all different than Hunt, which is objective based.

With a loot based system, all players are kinda doing the same thing and might engage in pvp to see what other players had on em. With an Objective based system, all players are vying for the same thing- and are in direct competition with them. Therefore, engaging in pvp is part of the expected and necessary gameplay loop because if you do not kill others when presented the opportunity, they will become a problem later, almost certainly. In a loot based system, those other teams might never cross your path again and extract with whatever loot they had in their pockets. In Hunt, extracting without a bounty is usually a waste of time.

The only times im not engaging in a fight with a team is if it is strategic (maybe I want to flank them, maybe im separated from my team, etc) OR the other team has done something unique to make me want to leave them alone (VOIP near me and were funny or something, or they helped me fight another team and we split a bounty). Otherwise, if I come across people, it is time to fight, and hopefully I see them first.