It makes sense - they grew up in a time where news was (relatively) reliable/truthful, so perhaps don't have the same "this may not be true" skepticism that younger generations have.
Also, politics aside, the younger generation has some sophistication about domain names (which are essentially their news sources) in general. They know a domain that's been around vs. one like justice-freedom-eagle.usa that looks like a default wordpress template with stock clip art. They may get their news from aggregators and live in their respective bubbles, but they're more likely to see through a shady looking…
Is that really true though? A lot of the younger folks on my Facebook share stuff from things like "natural-truth-health.net" or "gmo-truth-toxic.tk" or "naturalnews.com".