Well, reality disagrees with you ... and my fact was commenting on what happens to me "my own group" ... not what happens to you.
There are just not enough healers to cover the demand for dps... so it comes down purely to how lucky I am with keystones, the fact my iLvl isn't as high as other dps and that I'm not a favoured class for M+ and probably the time of day I get to play. Takes under a second for a group with a healer and tank to fill up, several minutes with a tank and hours if I only have dps.