I remember when complex carbohydrate was a phrase used in place of starch. Because everybody used to know excess starch was bad for you, so they needed a new term. Now it's moving over to mean fiber etc. I've even seen it used to describe fruit, as if sugars are complex...

I don't currently need much help digesting plant fibers.

I think they should continue to look for ways to make a plant based diet as healthful as possible, since so many people are likely to continue eating one.