To adults, they hear about evolution from scientists - who are generally less able to present the case in an appealing way to the lay person.
I don't think that is generally true. Less inclined perhaps but not necessarily less able, although I guess it depends what you consider 'appealing'. I'd also question the contention that this is where where most adults get their information about evolution. I would have thought that rather than scientists the media would be the primary source, perhaps only indirectly from scientists.