That is true of ANY situation where you have volunteers.
But it's most dangerous in a religious instruction context. If an adjunct professor teaching legal research and writing to 1st year law students blows off the hard work and doesn't teach the kids, because all she wants is something to put on her resume (as far too many of my fellow adjuncts did), the kids will get shortchanged (and cheated out of something they've paid good money for) -- but at least she won't be endangering their souls.
I guess the Church is paying for 40 years of unbelievably bad catechesis. Now those shortchanged kids are teaching the kids.
I see it more with "professionals." Everyone I've known teaching at church or working with Scouts has been doing their best.
The *big problem* with RE, in my opinion, is that parents are half-hearted about their faith. I suppose getting the children to a class, most of the time, is *something*, but it's not much.
Speaking of “volunteers”. What is the deal? If we can not celebrate the Holy Mass properly, what are the chances for CCD. The GIRM states the conditions for even using extraordinary ministers for Holy Communion. (Getting out by noon is not one of them.) In the acceptable but rare use of extraordinaries, the GIRM states the order of selection. I believe this order is correct: priest, deacon, acolyte, sister, parish men, parish women, but assuredly the parish women are last. The duty of the priest is to do the selecting respecting this order, but NOT to simply accept volunteers with a wave of the hand. I look around and see the numbers of men sitting through the Mass who are receiving from women.