thing is, even a bad solution is better than nothing.
Nothing = pure rng what type of player you end up with, at that point its basicly as bad as automatic dungeonfinder.
Even if an astonishingly high number of player bought curve for gold or irl money (lets pick an insanely over the top large number like 50%), even in this ridiculous example, ahead of the curve is still an improvement compared to trying to pug without any indicator of experience. Because at least 50% of the time, you get a person who knows the fight.