Just like the "average person" can't become a neurosurgeon just because they'd really like to, the "average person" can't suddenly become an expert in astrophysics because "all that science-y talk is hard, man: let's make it simpler!".
What is it about cosmology and particle physics that attracts so many laypersons to throw their two cents in?
"If you can't explain it simply, you don't understand it well enough.
- Albert Einstein (Which is also attributed to Richard Feynman by some people)
Just remember, Einstein's famous equation - E equals m times c squared - is 8th grade or Freshman year math, no matter the physics behind it.
Lay people get honorary degrees all the time. These scientists aren't magicians. You can learn their 'secrets'. When I ace'd my Astronomy class in college, it didn't make me better than some hobbyist who never took a class, but has read every book on the subject for the last 2 decades. That amateur could possibly know more than some college professors.
Don't get stuck on the credentials.
It is the height of arrogance to think that no one can learn this. Or that any of the scientists couldn't be wrong.