The devs as of now do want us to work towards Tier 2 gear at Quality level 5. That is the current progression arc. Whether they return Quality 6 once legendaries come out or not has not been revealed. The reason they want Legendaries and a Tier 3 version of each piece of gear that is super rare and luckbased is to encourage scavenging and exploring. They don't want the game to be entirely a looter shooter-- they want there to be a space for crafting your way along a progression arc and then super powerful items that you can use to augment your kit but are not intended to fill every slot of your kit. They want you to find some things in one game and other things in subsequent games so that every time you play you are finding something new and different.
From a survival point of view this creates gamespaces where the player must adapt to the circumstances of the world in which they find themselves-- not always being in control but striving to come through the uncertainties without dying.
I do completely understand if you just hate it though.
Cheers