The question is, how long did that one character last and did you then have to churn through several more before one "took hold" and stuck around a while.
As Ezekiel noted upthread, the "funnel" process tries to concatenate that churn-through-several-characters phase into one adventure. To him, that's good design because it takes a long process he doesn't like and makes it a short process he doesn't like; which is fair enough.
What isn't noted, however, is that DCCRPG remains considerably more lethal than 5e even after the funnel process is completed.