I find that remark to be somewhat insulting. You make it sound as if traditionalists don’t care and don’t want to be involved. I would assume that the number that is involved percentage wise is about the same as in the more progressive circles.
But lets look at things realistically for a minute. Liberal Parishes outnumber Traditional Parishes by a substantial margin. Not a small number of these progressive Parishes have as Directors of religious education extremely liberal and very progressive people who want little or nothing to do with anything that even comes close to being conservative or traditional in any way. I have faced that particular problem for years, usually having to go to either the Pastor or in one case the Auxuillary Bishop in order to get things straightened out. In that one memorable case, my teaching that practicing homosexuality was indeed frowned upon by the Church, does that sound politically correct enough?, was not at all consistent with the Directors view that all sexuality was a gift that should be enjoyed to the fullest. The Bishop agreed with me but the Director basically told him to go climb a rope and to butt out of Parish business. He said that as he was hired by the Parish Council, he worked for them, not the Diocese and he therefore was not required to take orders from the Diocese.
I will guarantee you that particular director is far from unique. Many of these people are well entrenched and run their programs as their own little fiefdoms in which they do, say and teach pretty much exactly what they want, regardless as to whether or not it fits in with Catholic teaching at all.
That is more than likely the reason you don’t see more Traditionalists involved. If you can get your foot in the door and in many places that is a very big if, you are constantly being monitored, watched over and having your lessons derided by the more progressive and liberal minded. You are pretty much required to adhere to lesson plans that far from teaching anything about Catholicism meander mindlessly around with stirring platitudes about love respect and tolerance for all. Yes, the teaching of the Social Gospel,where the ultimate aim of religion is the ethical raising of society is pretty big in RCIA and CCD classes.
I am quite sure that my experience in this area is far from rare and in fact is probably the norm, except in the more traditional and conservative Parishes.
Now I know that there are good solid Parishes with good solid catechisis, but from attending workshops over the years and going to re-certification classes, as well as instructing in several different parishes , I can tell you, the progressives have pretty close to full control and have no intention of giving it up.