being fair, if you know how to make turn a PE into Heroic mode, it's usually not a big deal to do it yourself. Glimmer extractions are pretty much the only ones can go unturned when new players kill all the mobs. Almost everything else, tho, usually only takes 1 person in the group with enough firepower and knowledge.
but i get ya, it can be frustrating when you're clearing doing something and new players dont recognize what youre doing or even help at all. "I'm shooting this glimmer extractor for a reason, help me destroy it so our loot gets better", not really something you can type out in chat, assuming anyone reads chat (YOU DONT, DONT LIE TO ME). A smart new player would do as they see other veteran players doing.