Low intensity mobs have a benefit in not being as difficult. Faster clear times. But more pox hounds? Higher intensity mobs? Not being able to see a meter in front of your face?
I can appreciate the mentality that you’re only there to complete one objective, so nothing else matters. Hence why killing bosses like daemonhosts is totally irrelevant. However, this is also a video game we’re playing.
There should be some sort of associated - and more importantly targeted - benefit to completing a mission that’s been made more difficult for otherwise no reason.