I don't believe it for a second. Every other mmo on the planet filters you into dungeons based on what is needed, not whether or not you personally feel like a fresh run. Duty roulette is just that, a roulette (like "random" dungeons).The tool picks, not you. SE trying to reinvent the wheel by allowing people to choose whether they can be filtered into a partially complete run or not has done nothing but cause groups to have to disband because of lack of members, driving queue times up as those people reenter the queue to start over again. You are voting against your own best interests with a comment like that.
All these growing pains have already been done in other mmos. Every single one has been addressed in "that other game". I guarantee in 6 months or less SE is going to come to the same conclusions. Duty finder will filter people based on need, you'll still get your bonus if you are filtered into a 3/4 run, and no one will be able to see where the group is at and withdraw. You will still get a guaranteed "fresh" run if you pick a specific dungeon, and queue times will decrease as people are completing content instead of having to re-enter the queue prematurely.
As far as the OP, that's kind of what I started doing - not using that check box at all. After my 6th queue in a row into an empty Stone Vigil I just gave up. It was nice of them to give us choice, but it causes too many actual problems with completing content and that's why other games don't do it.