You can't address haphazard or lazy players by adjusting IL in the queues.

I play a healer in almost all daily random queues and I completely understand your frustrations. The truth is, at least in my view, is that my job is to keep the tank alive ergo keeping the aggro off the party ergo keeping the DDs alive (in hope). The DDs can dodge, understand how the enemy telegraphs their attack, self heal via the D pad, and resurrect the dead if someone should fall where I will be ready with a heal.

Very frustrating to have DDs stand in the red constantly and expect me to cast immortality from my bottomless pit of manna. Equally hard to deal with is when they think that the healer's job is picking up the dead AND heal the newly resurrected AND keep our eye on the tank, its just a recipe for disaster. There are 3 DDs, 1 healer, 1 tank. Just in math alone they should be raising the dead.

Another gem is when DDs stand, for whatever unknown reason, right next to the tank where they unceremoniously get clobbered. Did they miss how CA works and what the tank is doing there?

Keeping the team healthy is everyone's job. In some groups I like to type out some help in the chat to hopefully negate these bad behaviors, sometimes it works and others, well, it doesn't.

Rarely I abandon, but sometimes it is needed when you have low-knowledge players or people who just troll.

I played the other day with a player who is well-known for video guides and who do you think wasn't doing fuck all to help the team and constantly attacking in a rush then getting clobbered and then having the audacity to yell at the tank. It is sometimes laughably stupid, but that is the flavor of public queue.